Author: BiomesInaBox

A splash of bright color can bring any aquarium to life, and few choices are as eye-catching as yellow freshwater aquarium fish. From subtle golden hues to bold contrasts like yellow and black freshwater fish, these species are a favorite among aquarists for their beauty and lively presence. Whether you’re looking for vibrant blue and yellow tropical fish or want to highlight the natural glow of fish that are yellow, there are plenty of options that thrive in a home tank. Adding a yellow fish in aquarium setups not only enhances visual appeal but can also create a stunning contrast against plants, driftwood, and other tank mates, making them an excellent choice for beginners and seasoned hobbyists alike.

These fish are fantastic options for freshwater aquariums. Be advised that not all of these fish are compatible with one another. It’s important to do research on each fish and learning about their compatibility with other fish before purchasing. Also, consider taking a look at my other article, 10 Red Tropical Fish for Your Freshwater Fish Tank, for more unique fish coloration options.

1. Gold Barb

The Gold Barb is an excellent choice as a yellow freshwater aquarium fish. That’s because it combines beauty, hardiness, and peaceful behavior. Its shimmering golden-yellow body adds a striking pop of color. This is especially true when kept in small schools where their group swimming creates an impressive display. Gold Barbs are hardy and adaptable, and tolerate a wide range of water conditions. This makes them ideal for both beginners and experienced aquarists. They are also peaceful community fish that coexist well with other non-aggressive species. Their vibrant appearance and easy care make Gold Barbs great choices for freshwater aquariums.

2. Marigold Swordtail

Marigold swordtails are a fantastic choice for a freshwater aquarium because of their striking golden-yellow coloration. They are also accented by bright orange tones that make them stand out beautifully in community tanks. Their active swimming behavior and elegant sword-like tail add visual appeal. This makes them a centerpiece fish that are not usually overly aggressive. They’re also hardy, adaptable to a wide range of water parameters, and generally easy to care for. This makes them suitable for both beginners and experienced aquarists. Another advantage is their livebearing nature, which can be fascinating to observe for hobbyists interested in breeding and raising fry.

There are a few downsides to keeping Marigold Swordtails. Males can sometimes display territorial or aggressive behavior, especially if there are too many in a confined space. A good male-to-female ratio is important to maintain harmony in the aquarium. Being livebearers, Swordtails tend to breed rapidly, which can become an annoyance. This is because the population in the tank may quickly outgrow the available space. Additionally, they require ample swimming room and benefit from a well-filtered tank. They may not be the best fit for very small aquariums. Despite these considerations, with proper care and planning, Marigold Swordtails are a lively, colorful, and rewarding addition to a freshwater setup.

3. Yellow Lab Cichlid

Yellow Lab Cichlids are among the most popular African cichlids thanks to their vivid, solid yellow coloration. Their bright lemon color brings a splash of contrast to freshwater aquariums, especially in rocky aquascapes that mimic their natural Lake Malawi habitat. Yellow Labs are hardy and long-lived when properly cared for. This makes them a good choice for hobbyists who want a showy yet manageable African cichlid.

Unlike many of their more aggressive cousins, Yellow Labs can coexist fairly well with other Mbuna cichlids, provided the tank has enough space and hiding spots. Their strong personality and engaging behavior also make them fascinating to watch. If you’re looking for the ultimate splash of yellow, consider setting up a species-only Yellow Lab Cichlid aquarium.

On the downside, Yellow Lab Cichlids still share some of the territorial tendencies common to cichlids. Males, in particular, may chase or harass others, especially in smaller aquariums. They also require harder, alkaline water that mimics Lake Malawi conditions, so they may not thrive in softer or acidic water without adjustments.

Their diet needs to be carefully managed as well, since too much protein-rich food can lead to digestive issues like Malawi bloat. Finally, they generally require larger tanks (ideally 55 gallons or more for a small group). This will help reduce aggression and provide enough swimming and territory space. With proper care and setup, though, Yellow Lab Cichlids are one of the most rewarding and visually stunning yellow fish species available for freshwater aquariums.

4. Gold Nugget Plecostomus

Gold Nugget Plecos are highly prized freshwater aquarium fish. This is thanks to their striking black bodies covered in bright golden-yellow spots and edged fins. Their unique coloration and armored body make them an instant centerpiece in any tank. This is especially true in aquascapes with driftwood and caves, where they can show off their natural beauty.

This fish species also serves a functional role. Golden Nugget Plecos help control algae growth while scavenging uneaten food, contributing to tank cleanliness. They’re generally peaceful bottom-dwellers. This makes them suitable companions for a variety of tankmates as long as water quality and space are maintained. For aquarists who enjoy unique and rare species, they’re considered a true “show fish” that adds both beauty and function.

On the downside, Gold Nugget Plecos do come with challenges. They can grow quite large (up to 8–10 inches), which means they require a spacious aquarium, ideally 55 gallons or more, to thrive. They’re also more sensitive than many pleco species, needing excellent filtration, high oxygen levels, and stable water conditions to stay healthy. Their diet must include more than just algae. They need supplemental foods such as sinking wafers, blanched vegetables, and occasional protein to avoid malnutrition.

Another consideration is cost. Gold Nugget Plecos are often expensive compared to many other plecos, and their specialized care makes them less suitable for beginners. Despite these drawbacks, for aquarists willing to meet their needs, Gold Nugget Plecos are a stunning and rewarding investment that can become a true highlight of a freshwater setup.

5. Pineapple Platy

Pineapple Platies are a vibrant and hardy freshwater fish, named for their fiery yellow-to-reddish-orange gradient that resembles the colors of a ripe pineapple. They’re small, peaceful, and active, making them excellent additions to community aquariums with other non-aggressive fish. Their manageable size (about 2–3 inches) and adaptability to a wide range of water conditions make them beginner-friendly while still being appreciated by experienced aquarists. Like other platies, they’re livebearers, which means they reproduce easily. This is something many aquarists find exciting. Their bright colors, energetic swimming, and ease of care all combine to make Pineapple Platies a cheerful, low-maintenance highlight in freshwater setups.

The downsides, however, are worth considering. Similarily to Marigold Swordtails, Pineapple Platies breed incredibly easily. This can make overpopulation a problem in smaller tanks if fry aren’t managed or rehomed. Males may occasionally chase females excessively if there isn’t a proper ratio of females to males. This can stress the females over time. A ratio of 3 females to 1 male is recommended. However, more females means more breeding, which is a double-edged sword with these fish.

While hardy, they still require good water quality and a balanced diet to maintain their color vibrancy and health. They also aren’t as long-lived as some other species. Pineapple Platies typically live 2–3 years, so hobbyists looking for a longer-term companion might find them relatively short-lived. Still, with their brilliant pineapple coloration, peaceful nature, and easy care requirements, Pineapple Platies are a fantastic choice for aquarists who want a splash of tropical color without a lot of fuss.

6. Gold Doubloon Molly

Gold Doubloon Mollies are striking yellow and black freshwater fish that instantly stand out with their bold two-tone coloration. They usually showcase a vibrant golden-yellow front half fading into a deep black back half. This contrast makes them a true showpiece in community aquariums, and like other mollies, they’re hardy, adaptable, and beginner-friendly.

They thrive in a variety of freshwater setups, tolerate a wide range of water conditions, and are peaceful enough to be kept with many other community species. Their livebearing nature can be fun for hobbyists who enjoy breeding. Also, their constant activity and light schooling behavior bring lively energy to the aquarium. The combination of beauty, hardiness, and personality makes Gold Doubloon Mollies a very rewarding option for yellow fish in a freshwater aquarium.

On the downside, mollies, including the Gold Doubloon variety, come with some challenges. They are sensitive to poor water quality and benefit from slightly brackish conditions (a touch of aquarium salt), which not all community fish can tolerate. Like other livebearers, they breed rapidly, so population control can become an issue if you don’t separate sexes or manage fry. Males may also occasionally harass females if the male-to-female ratio is off, so keeping multiple females per male is recommended.

Additionally, mollies are prone to diseases such as ich or fin rot if stressed. While generally hardy, they do require attentive care and a stable environment to truly thrive. For aquarists willing to meet their needs, Gold Doubloon Mollies offer an eye-catching mix of color and activity that can really elevate a freshwater tank.

7. Gold Dojo Loach

Gold Dojo Loaches, also called Weather Loaches, are fascinating freshwater fish with long, eel-like bodies and a beautiful golden-yellow coloration that makes them stand out in aquariums. They’re known for their quirky, playful behavior. They’ll often burrow into substrate, wriggling around decor, and even swim up to the surface for air thanks to their ability to breathe atmospheric oxygen.

Many aquarists love them because they’re interactive and seem to have personalities. They may recognize you and become active at feeding time. They’re also hardy, adaptable to a wide range of water conditions, and long-lived (sometimes over 10 years with proper care). Their unique appearance and behavior make them both a conversation starter and a useful addition to tanks, as they help clean up leftover food on the substrate.

On the downside, Gold Dojo Loaches are not ideal for every aquarium. They grow fairly large, often reaching 8–12 inches in length. This means they require a spacious tank, ideally 55 gallons or more, with a soft substrate that allows them to burrow without injury. They’re also quite active, which means small tanks can stress them and lead to stunted growth. Because they’re opportunistic eaters, very small tankmates (like baby shrimp or fry) may get eaten.

Another quirk is that they can be escape artists, sometimes jumping out of tanks without secure lids. Finally, they prefer cooler water than many tropical species (around 65–75°F), so they’re not always compatible with standard tropical community setups. Despite these challenges, Gold Dojo Loaches are hardy, fun, and rewarding fish for aquarists who can meet their space and temperature needs. Be advised that Dojo Loaches/Weather Loaches are considered invasive in many parts of the United States. It is illegal to keep them in certain locations.

8. Golden Wonder Killifish

Golden Wonder Killifish are gorgeous freshwater fish known for their shimmering golden-yellow bodies paired with iridescent blue and red highlights. They’re surface-dwelling fish with an elegant, elongated shape and large, expressive eyes that give them a lot of personality. Their striking appearance makes them an eye-catching addition to community aquariums, especially since they tend to stay near the top where many other species don’t occupy. Golden Wonders are hardy, adaptable to a range of water conditions, and relatively undemanding in terms of care, making them accessible to both beginners and experienced aquarists. They also display fascinating hunting behavior where they hover near the surface and dart for food with precision.

On the downside, Golden Wonder Killifish have some traits that require consideration. They are predatory by nature and will happily eat small tank mates such as Neon Tetras, shrimp, or fry. They’re best kept with medium to larger community fish. They’re also excellent jumpers, which means a tight-fitting lid is a must to prevent escapes.

While generally peaceful, males can sometimes be territorial, especially in smaller tanks or when competing for females. They also prefer calm or moderately filtered tanks rather than strong currents, so their setup needs to be considered carefully. With proper tankmates and a secure environment, though, Golden Wonder Killifish are hardy, striking, and unique fish that add brilliance and activity to the top levels of an aquarium.

9. Albino Silver Hatchet

Another top dwelling aquarium fish is the Albino Silver Hatchetfish. They are a striking and unusual freshwater species, instantly recognizable by their unique hatchet-shaped bodies. They also showcase shimmering white-silver coloration with a subtle pinkish hue from their albino genetics. Their body shape and tendency to occupy the very top of the water column make them fascinating fish to observe. This is true when they’re in groups where they display their dynamic behavior.

They’re peaceful and generally get along well in community aquariums with other small, non-aggressive fish. This makes them an excellent choice for aquarists who want activity in the upper levels of their tank. Their unusual look, rarity compared to standard silver hatchetfish, and schooling nature make them a real conversation piece and a way to add variety to an aquarium.

On the downside, Albino Silver Hatchetfish can be more delicate than many other community species. They’re highly prone to jumping, often leaping out of tanks when startled, so a tightly fitting lid is essential. They also require excellent water quality, a calm environment, and plenty of swimming space near the surface, which makes them less forgiving for beginners.

Albino Hatchetfish need appropriately sized foods (like baby brine shrimp, daphnia, or crushed flakes) because of their small mouths. They may not compete well against more aggressive feeders. They’re also best kept in groups of six or more, which means a larger tank is necessary to keep them comfortable and reduce stress. Despite these challenges, Albino Silver Hatchetfish are a rewarding and visually stunning addition to a peaceful, well-maintained community aquarium.

10. Sunset Guppy

Sunset Guppies are a vibrant and popular variety of guppy, named for their gradient coloration that often shifts from bright yellow and orange to deeper red tones. This resembles a glowing sunset. They’re small, peaceful, and incredibly active, making them a lively centerpiece in community aquariums. They adapt well to a wide range of freshwater conditions, making them perfect for both beginners and experienced aquarists. Guppies, including the Sunset variety, are also prolific livebearers, so hobbyists can easily breed them and enjoy the excitement of raising fry. Their dazzling colors, playful personalities, and ease of care make Sunset Guppies one of the most rewarding and accessible fish for aquariums of all sizes.

The downsides mostly revolve around their breeding habits and fragility. Since they reproduce rapidly, tanks can become overcrowded if fry aren’t managed or rehomed. Males may also pester females relentlessly, so keeping more females than males is necessary to reduce stress. While generally hardy, guppies can be vulnerable to common freshwater diseases like fin rot and ich, particularly if kept in poor water conditions or overcrowded tanks. They also have relatively short lifespans (often 2–3 years), which can be disappointing for aquarists looking for long-term pets. Despite these challenges, Sunset Guppies bring unmatched color, activity, and charm to community tanks, making them a staple choice for aquarists who love vibrant, easy-to-keep fish.

11. Yellow Honey Gourami

Yellow Honey Gouramis are peaceful, elegant freshwater fish that shine with their soft golden-yellow coloration. Unlike many gourami species, they stay relatively small (about 2 inches), making them ideal for smaller community aquariums or as centerpiece fish in nano setups. Their calm temperament, gentle swimming style, and tendency to explore plants and decorations make them soothing to watch. They’re also labyrinth fish, meaning they can breathe atmospheric air, so you’ll often see them rise to the surface in a charming, deliberate way. Their bright yellow hue, paired with their peaceful nature, makes them a perfect choice for aquarists looking for a splash of warm color without aggression.

On the downside, Yellow Honey Gouramis can be a little shy, especially when first introduced to a tank, and they may get bullied by more boisterous or fin-nipping species. While hardy overall, they do require stable, clean water conditions and can be sensitive to sudden parameter changes. Males, though less aggressive than many other gouramis, may still show territorial behavior during breeding.

Because they’re small and somewhat delicate, they’re best housed with gentle tank mates rather than larger or fast-moving species that might outcompete them for food. Despite these considerations, Yellow Honey Gouramis are an excellent, beginner-friendly fish that bring color, tranquility, and personality to a freshwater community tank.

12. Yellow Marlboro Discus

Yellow Marlboro Discus are among the most striking and prized freshwater fish, especially for aquarists who love centerpiece species. Their bold, solid golden-yellow coloration contrasted with a red-orange face makes them truly stand out, even in tanks with other colorful fish. They have a graceful, disc-shaped body and a slow, elegant swimming style that gives aquariums a calm and majestic presence. Discus are also highly social and thrive in groups. They create a dynamic yet peaceful display when kept in a proper school. For aquarists with some experience, Yellow Marlboro Discus are the ultimate show fish.

On the downside, they are considered one of the more demanding freshwater fish to keep. Discus require very clean, warm water (82–86°F), stable parameters. Low nitrate levels are also needed to thrive, making them less suitable for beginners. They are sensitive to stress and can be prone to disease if water quality drops. Because they prefer to live in groups of at least five or six, they need a spacious tank (75 gallons or larger). This increases the cost and level of care required.

Their specialized diet, often including high-quality frozen or live foods, also makes feeding more involved than with hardier community species. Lastly, Yellow Marlboro Discus are expensive compared to most freshwater fish, both to purchase and to maintain. Despite these challenges, for aquarists ready to meet their needs, they are one of the most rewarding and breathtaking fish available in the hobby.

Final Notes

Yellow tropical fish bring a unique vibrancy and warmth to freshwater aquariums, acting as living rays of sunshine that immediately draw the eye. Whether it’s the bold, regal presence of a Yellow Marlboro Discus, the energetic playfulness of a Sunset Guppy, or the tranquil grace of a Yellow Honey Gourami, these golden-toned species add both beauty and character to a tank.

Beyond their colors, yellow fish often fill different roles in the aquarium. Some are centerpiece fish while others are active schoolers, and hardworking bottom-dwellers. This makes them versatile choices for aquarists of all experience levels. While some yellow tropical fish are hardy and beginner-friendly, others require more advanced care, stable water conditions, and specialized setups. This means aquarists can find a yellow species suited to nearly any skill level. Altogether, yellow fish provide not just visual appeal but also variety, personality, and even functionality, making them an enduring favorite in the aquarium hobby.

Let’s be honest, there are countless fish that are available in this hobby, and it can get overwhelming deciding which to purchase. I have the hardest time choosing fish for my aquariums because I like different ones for different reasons. This article contains fish that I personally love and would recommend adding to a 20-gallon freshwater fish tank.

You’ll have to research stocking limitations and the compatibility of these fish. I do not recommend adding all of these fish into one fish tank. They’re not all compatible with one another, or you might need a larger fish tank to keep different species. This list simply showcases what could possibly be kept in a 20-gallon aquarium.

Cherry Barb

Cherry Barbs are fantastic additions to 20 gallon freshwater aquariums. Males add an additional pop of red, while females introduce a nice subtle, red/brown combination into the mix. For the most part, Cherry Barbs keep to themselves. Most people agree that they don’t usually bother other fish. If you choose to have a group, consider getting at least 2-3 females for each male. Males could bother females relentlessly, which is similar to what male guppies do to females. So having a larger ratio of females will help disperse the pestering. Regardless, if you’re looking for a barb for your 20 gallon fish tank, consider picking up Cherry Barbs.

Cardinal Tetra

Personally, I prefer the look of Cardinal Tetras over Neon Tetras. That horizontal red streak on the Cardinal Tetra’s belly can’t be beat. Their reds and blues balance beautifully with a well-planted aquarium, and the vibrance grows if you choose to keep them in a blackwater aquarium. Cardinal Tetras generally seem more vibrant compared to Neon Tetras. I highly recommend them for a 20-gallon aquarium because they stay relatively small, do great in groups, and have spectacular red and blue colors. If you’re looking for a centerpiece schooling fish, look no further than a Cardinal Tetra.

Celestial Pearl Danio

Just looking at a Celestial Pearl Danio should be reason enough to know why they made this list. They are gorgeous looking fish with vibrant colors and white spots throughout their bodies. Celestial Pearl Danios (CPD) are also very peaceful and great options for heavily planted fish tanks. Also known as Galaxy Rasboras, these fish have an additional perk to them. They do well in aquariums with water tempereatures ranging between 72° and 76°F. If you live in an area where the ambient temperature of the home sits in that range, you may be able to keep this fish thriving without a heater. I highly recommend checking this fish out if you’re looking for a peaceful community fish, and you can likely keep anywhere between 10 and 12 individuals in a 20 gallon aquarium.

Harlequin Rasbora

Harlequin Rasboras are probably one of my favorite schooling fish. I love the orange, white, and black colorations on their bodies. Harlequin Rasboras will really stand out in a well-planted fish tank. They also have a bulkier build to them, compared to other fish that are streamlined in appearance. These Rasboras are also fairly hardy and generally do well in community tanks. However, use caution because some aquarists do say Harlequin Rasboras can become a little nippy. Not to the same extent as Tiger Barbs, but there are reports of these fish bothering Corycats and other incredibly peaceful fish.

Neolamprologus multifasciatus

Many cichlids get enormous and/or incredibly aggressive. Luckily, there are a few species that stay small and are generally peaceful. This includes the Neolamprologus multifasciatus, also known as Multis. They are shell dwelling cichlids from Lake Tanganyika. They spend most of their days patrolling and defending their shell from other Multis. They bring a unique personality to the aquarium world that you don’t often see. It’s really fun and exciting watching them defend their space or search for a new one.

Keeping Multis is a bit different because you will more than likely devote an aquarium to them. They are often kept in a species-only aquarium. This is perfectly fine for me, because watching them fight and defend their shells all day is enough entertainment. If you’re looking for a unique experience in the freshwater world consider setting a fish tank up for Neolamprologus multifasciatus. They are hardy, fun to watch, and breed fairly easily.

Rummynose Tetra

I love the torpedo appearance of Rummynose Tetras. They look amazing in a well-planted aquarium, especially if you have a decently sized school. The black and white tail with red face gives them a very unique appearance, which stands out in a fish tank.

Rummynose Tetras are a great choice for a 20-gallon aquarium. However, I have to point out that they are incredibly sensitive. If anything goes wrong in the aquarium, they are usually the first to suffer or perish. Regardless, they’re a fantastic fish that look great in 20-gallon fish tanks. If you have a larger fish tank, and are looking for something that looks similar to Rummynose Tetras, consider checking out Denison Barbs, also known as Roseline Sharks. They grow to be a bit larger, but have a similar shape and coloration.

Bristlenose Pleco

Many plecos grow to massive sizes, but fortunately, there are a few species that remain pretty small. Bristlenose Plecos are one of those, and only grow to about 6 inches at their maximum. This makes them great candidates for a 20-gallon aquarium. They’re great at eating food at the bottom of the aquarium, and will keep up with algae for the most part. Males have showy bristles over their face, which adds to their charm when they mature. Unfortunately, females have small whiskers. If there is enough decor for them in the fish tank, these fish may disappear in the aquarium for days to weeks at a time.

Bristlenose Plecos eat algae and food that falls to the bottom of the fish tank. However, you will likely need to supplement their diet with more food. If not, they run the risk of starving in a fish tank. Algae wafers are an excellent option for Bristlenose Plecos, and some aquarists feed them cucumbers and zucchini.

Peacock Gudgeon

If you’re looking for a unique fish with striking colors, check out Peacock Gudgeons. The dominating colors on this fish include red, yellow, and blue. Peacock Gudgeons are a member of the goby family and are perfectly fine being kept in freshwater aquariums. They’re incredibly peaceful fish and only grow to about 2 inches when fully grown. Peacock Gudgeons are micro predators that do great as a pair or in groups of 6 to 8. They should easily accept dry pellet food, but being predators, I highly recommend providing them with protein-rich frozen foods as well.

Care must be taken when keeping Peacock Gudgeons. Being related to gobies, they’re known jumpers. A well-fitted lid will likely be a must because not only are they jumpers, they’re also quite skittish, which increases the likelihood of them jumping.

Clown Pleco

If you’re looking for something a little smaller than a Bristlenose Pleco and don’t care as much for the algae eating aspect of a pleco, consider checking out Clown Plecos. They max out at about 4 inches and have incredible colorations. Some people may get turned away from them because they are wood eaters and can make a mess because of their diet. I enjoy the unique behavior, and will happily deal with the mess to get a chance of hearing the crunching sounds when this fish munches on driftwood.

The key to their success is providing plenty of hiding spaces and driftwood for their diet. If you are not planning to provide both in the aquarium, don’t get this fish. They’ll graze on algae but they aren’t the algae eating powerhouses other clean up crews provide.

Killifish

There are many different species of Killifish, and their colorations, small size, and peaceful temperament make them great options for 20 gallon aquariums. They are especially eye-catching in well planted aquariums.

Killifish may also be a great option for those who enjoy changing the stocking of an aquarium often. Certain Killifish species have incredibly short lifespans. These Killifish only live for anywhere between 6 to 12 months. They often spawn to continue populating the aquarium but they may not which allows you to replace them knowing they moved on naturally instead of being sent back to the pet store.

Final Notes

This list contains the 10 Best Fish For a 20 Gallon Tank, from my perspective. This list is completely opinionated, and I know many of you have your own top 10 fish list. When formulating my list, I try to provide fish with unique characteristics, habits, and behaviors. This list is much different than my 10 Best Fish For a 10 Gallon Tank – Freshwater Edition, which I advise you check out as well. If you have your personal list of fish you’d like to contribute to this website, consider reaching out!

Many of us in the freshwater fishkeeping hobby have been taught to keep our aquariums between 72 and 80 degrees Fahrenheit. Some fish need warmer water, but others will thrive between these temperature ranges. Many fish are considered tropical and need warm water to be successful in an aquarium. Others are more tolerant of both warm and cooler water temperatures. When researching fish stocking for an aquarium, it is important to learn which fish can be kept under what conditions. This article will discuss a handful of fish that can be kept under cool water parameter conditions, likely not requiring a heater.

Aquarium heaters aren’t always used to maintain warm water temperatures. At times, they are used to keep water temperatures stable. If your home has fluctuating temperatures, it might be a good idea to keep an aquarium heater running to assist in reaching stable water parameters. Check out the 6 Best Aquarium Heaters for Freshwater & Saltwater Fish Tanks to see a handful of different companies that make heaters to help warm your aquarium water or help keep your water temperatures stable.

1. White Cloud Mountain Minnow

Many newcomers in this hobby have likely seen or heard of White Cloud Mountain Minnows. They are often suggested to new fish keepers because of their hardiness, beautiful colorations, and active personalities. White Cloud Mountain Minnows are also excellent options for aquariums that do not run heaters. They do best in cooler water conditions, and it’s recommended to keep them between 65-75° F. White Clouds come in two varieties. You can find “normal” White Cloud Mountain Minnows and the “gold” version, which is essentially an albino version of the fish. Both types are gorgeous options for a planted aquarium.

If you’re shopping for these fish online, consider purchasing White Cloud Mountain Minnows (affiliate link) from TheShrimpFarm. Also, check out the White Cloud Mountain Minnow – Complete Care Guide to learn more about this fish.

2. Zebra Danio

If you’re looking for another incredibly hardy, active fish that does well in cool water, look no further than Zebra Danios. They tolerate water temperatures between 65 and 75° F. Calling them active is an understatement. Zebra Danios spend most of their time moving throughout the aquarium. They do best in groups of at least 6, but more is always recommended. Zebra Danios are not as flashy as many other freshwater fish but have unique horizontal stripes running across their body.

The Zebra Danio is a fairly common fish that can be found at fish stores. They come in silver and gray colorations, albino, and Glofish® has a colorful line of Zebra Danios.

3. Guppy

Anyone who has kept freshwater aquariums likely knows about Guppies. These fish come in an assortment of colors, are generally easy to keep, and are quite active. They are quite tolerant of many different water temperatures and will succeed in aquarium water temperatures between 65 and 82° F. From experience, most people do keep them in warmer water, but it should not be challenging to acclimate them to cooler aquarium temperatures.

For those of you who have not kept guppies, use caution because these are live-bearing fish. They produce live offspring instead of laying eggs and are prolific breeders. If you let these fish breed without intervention, your aquarium may slowly get overrun with Guppies.

4. Rainbow Shiner

Rainbow Shiners are cold-loving freshwater fish. They will do great in aquariums with temperatures as low as 60° F and as high as 72° F. They do best in cooler waters that are highly oxygenated. In the wild, they are found in slow to moderately moving streams, which bring ample oxygen from the surface. Rainbow Shiners’ colors change throughout the year. During the breeding season, the colorations on this fish are incredible. You’ll see them with an array of blues, pinks, and purples. However, they do lose quite a bit of color outside of their breeding season.

This fish species does best in groups of at least 6 individuals. They are social fish and do a fair amount of interacting when kept in larger groups. Check out their behavior in the beautiful stream aquarium.

5. Paradise Fish

Paradise Fish are gorgeous freshwater fish that come in an assortment of colors and can do great in a cool water aquarium. There are a few different species of Paradise Fish, but each species is a Gourami. Like other Gouramis, Paradise Fish have a labyrinth organ, which allows them to breathe air from the surface. Paradise Fish do well in aquarium temperatures ranging between 64°F and 78°F.

Use caution because Paradise Fish are known to be semi-aggressive to aggressive. Larger and heavily planted aquariums may help mitigate some aggression, but they are more than happy to terrorize an aquarium. Each person who has kept Paradise Fish likely has a different experience with them, because each fish has a unique personality.

6. American Flagfish

American Flagfish are fantastic algae eaters and very tolerant of cool-water aquarium setups. This fish species will do perfectly fine in tanks with temperatures between 66 ° F and 75° F. American Flagfish can display some aggression when kept in an enclosure that is too small or overpopulated, or during spawning periods. Otherwise, they are usually fairly peaceful and do not bother other tank mates. I recommend keeping them in small groups. If possible, they should be kept in a ratio of 1 male to 2-3 females.

7. Medaka Ricefish

Medaka Ricefish, also known as Japanese Ricefish, are fantastic nano fish for no heater aquariums. They do great in temperatures between 60 and 75°F. Medaka Ricefish should be kept in small groups of at least six individuals. A small group should have no issue being kept in a 10-gallon aquarium or mini-pond. This is because they should not grow more than 1.5″.

TheShrimpFarm has Galaxy Medaka Ricefish (affiliate link), which are white in color with a vibrant blue around their eyes. However, you can find Japanese Ricefish in different shades and colorations.

8. Dojo Loach

Like many other Loaches, Dojo Loaches exhibit a noodle-like appearance when they’re small. As they grow, they begin to change shape and look more like a hotdog. Their unique appearance goes perfectly with their interesting personalities. They often sleep on their side, bulldoze through the aquarium, and do other weird things. They’re really enjoyable fish to keep and do best in fish tanks with temperatures ranging between 65 and 75°F. Dojo Loaches do best in aquariums with a softer/rounded substrate that they can burrow into. They’re also considered escape artists and do best in fish tanks with well-fitted lids.

9. Hillstream Loach

The Hillstream Loach is a fish with a unique appearance. It has a flattened body to handle the fast-flowing streams of its natural habitat. These fish are gorgeous with black and yellow patternwork throughout their bodies. Reticulated Hillstream Loaches should not be kept in aquariums warmer than 75°F, but can be kept in temperatures as low as 64°F without issue. They can be fantastic tank mates for Rainbow Shiner, in appropriately sized fish tanks.

You can often find Reticulated Hillstream Loaches (affiliate link) for sale on TheShrimpFarm. They’re fantastic fish to keep in a properly designed enclosure. They will spend much of their time consuming algae and detritus on rocks and other surfaces, but should readily accept most foods provided.

10. Goldfish

If you have a very large aquarium or an outdoor pond, then Goldfish might be the right cool-water fish for you. Fancy Goldfish such as the Ranchu, Ryukin, and Oranda usually do great in temperatures between 68 and 78°F. Common Goldfish are often kept in outdoor ponds with fluctuating temperatures and seasons. If you decide to choose these fish, you have to understand that they get massive and are incredibly messy. They do best in larger volumes of water with excellent filtration to keep up with their waste production. Learn more about Goldfish by looking at the Goldfish – Complete Care Guide.

Final Notes

There are many cold-water enjoying fish out there, but these are my favorite choices based on shape, color, and behavior. This list is purely opinion-based, and other fish keepers may have different choices for their favorite coldwater freshwater fish. Let me know if you have experience with any of these fish or have a fish that you think should have made this list. Lastly, this list is in no particular order. Each fish is great in its own way.

Freshwater aquariums are probably the first things you dip your toes into when entering this hobby. Researching and learning about the many fish out there can be quite intimidating. This article will hopefully help cut down on the search by sharing ten fish I think are fantastic choices for a 10-gallon community tank. This list is comprised of my favorite fish for 10-gallon aquariums, The fish listed here are my personal choices and I understand there may be varying opinions depending on who you ask.

The Ember Tetra is a fantastic option for a 10-gallon fish tank. They’re incredibly small and will stay about 1.25 inches when fully grown. Ember Tetras have a very small bio-load and you can easily add 10-15 of them into a well-planted aquarium.

Ember Tetras are on this list because they remain incredibly small. They’re easy fish to keep, and you can add a good handful of them into a 10-gallon aquarium without issue.

Lambchop Rasboras (Trigonostigma espei) are peaceful and generally easy to care for freshwater fish. They’ll grow to about 1.5 inches at their maximum size which makes them a great choice for 10-gallon aquariums. Lambchop Rasboras have a nice orange color throughout their bodies, with a lambchop-shaped black splotch near their belly. They’re great additions to a well-planted tank and will lay eggs underneath broadleaf plants.

This fish species also made it to this list mostly due to their size. Lambchop Rasboras don’t get much bigger than the Ember Tetra. If you enjoy the look of Lambchop Rasboras but are looking for something a little more robust, consider checking out Harlequin Rasboras.

Threadfin Rainbowfish are often overlooked as a stocking option. Large rainbows seem to get most of the love. However, these fish have a unique look to them and have beautiful blue and gray colors throughout their bodies. Threadfin Rainbows stay quite small, only growing to about 2 inches. They’re also peaceful and do best in schools of at least 6 individuals.

The unique look and beautiful colors of the Threadfin Rainbow are why I felt they deserve to be on this list. They are gorgeous fish with a streamlined-looking body.

Gold Tetras are probably one of my favorite species of tetra and are a fantastic option for a 10-gallon fish tank. They have a great shimmer and are quite flashy in aquariums due to their vibrant gold/silver colors. They’re very peaceful and will not bother other fish in the aquarium. Gold Tetras do best in schools of at least 6 individuals. A 10-gallon aquarium should easily house 10 Gold Tetras.

The Gold Tetras are a wonderful addition to a 10-gallon tank. I enjoy the contrast they have to a heavily planted aquarium. Their gold/silver glimmer as they move gives them a spot on this list.

Betta Fish are really fun fish to keep. They have remarkable colors and we can’t forget about their incredibly long fins. Contrary to what you may have been taught, Betta Fish should not be kept in cups, small vases, or other small containers. However, they are a fantastic choice for 10-gallon community tanks. Bettas love to explore, and will likely utilize every part of the fish tank.

Most people know the charm of Bettas. Their personalities are some of the best in freshwater fish. Besides their wonderful personalities, Bettafish come in an assortment of colors. You can likely find a color that will match your style.

Pygmy Corys are exactly what you might expect. They’re a bite-sized version of a Corycat and only grow to about 1 inch. They will spend a lot of time shoaling with other Pygmy Corycats, but they’ll break away from the group and explore on their own.

I added them to this list because of their small size and many fishkeepers simply adore them. 10-gallon aquariums are fairly small, and this species of fish won’t take up the spotlight in the aquarium, but you may spend most of your time observing your goofy Pygmy Cory over other fish.

If you’re looking for a small clean-up crew for your 10-gallon aquarium, check out Otocinclus. They’re social algae eaters that do best in small groups. One might not keep algae at bay, but a team may be able to do great things to eradicate algae growing in your fish tank. Use caution because this fish species is a little harder to keep. They may be a little more difficult to acclimate to a new environment.

Otocinclus are on this list because they’re small algae eaters that are also fun to watch. In small groups that can assist in keeping an aquarium tidy. Snails and shrimp can do the job of an Oto, but the option to have a small algae eater is good to have.

Neon Tetras are a classic fish. Anyone can recognize the blue and red colorations on this fish. They also make great candidates for 10-gallon aquariums. Depending on filtration and how densely planted the aquarium is, you can easily add between 6 and 10 individuals.

Neon Tetras made it into this list because they’re classic fish with beautiful blue and red colors. The biggest downside to Neon Tetras is that they can be finicky. You can get a great batch of them that will love for years, but you may also get some that don’t do very well.

Scarlet Badis are an incredibly vibrant freshwater micro predator. They spend their days hunting for small shrimp, copepods, scuds, and other small inhabitants. They’re great for a 10-gallon aquarium setup that is heavily planted and might do best in a species-only fish tank because they can be incredibly shy.

I added them to this list because of their bright colors, which will pop in a 10-gallon fish tank. They are great for more experienced fishkeepers because of their picky diet and elusive personalities.

The Sparkling Gourami is a fish I don’t see often, but they’re great for 10-gallon community tanks. They only grow to about 1.5 inches and have incredible colors. The most eye-catching part for me is the blue ring Sparkling Gouramis have around their eyes. They can get a little territorial, but a male/female pair should do perfectly fine in a 10-gallon aquarium.

Another reason I suggest Sparkling Gouramis is because they make noises. During breeding season you may hear this fish make croaking noises. It’s a very odd feature in an already beautiful fish.

Final Notes

These ten fish are fantastic for a variety of reasons. They’re some of the best options in my eyes, but I know not everyone will agree with the fish I chose. If you own or have kept any of these fish, I’d be happy to hear your stories in keeping them. Let me know how you feel about this top 10 list! Check out 10 Best Fish for 55 Gallon Fish Tank if you’re looking for stocking ideas for a larger fish tank.

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