Zebra danio
Peaceful · Top · easy care
- 2 in adult
- 10+ gal
- 64–77 °F
- pH 6.5 to 8
- groups of 6+
Cold-water fish
Fish and invertebrates that are happy at a normal room temperature of about 65 to 72 °F, so the tank needs no heater. Keep them out of direct sun and away from radiators.
Fancy goldfish
Peaceful · All levels · easy care
- 8 in adult
- 20+ gal
- 64–74 °F
- pH 7 to 8
- groups of 2+
White cloud mountain minnow
Peaceful · Middle · easy care
- 1.5 in adult
- 10+ gal
- 64–72 °F
- pH 6 to 8
- groups of 6+
American flagfish
Semi-aggressive · Middle · easy care
- 2.5 in adult
- 20+ gal
- 65–79 °F
- pH 6.5 to 8.5
- alone or pair
Asian stone catfish
Peaceful · Bottom · moderate care
- 1.6 in adult
- 10+ gal
- 64–75 °F
- pH 6.5 to 7.5
- groups of 3+
Black moor
Peaceful · All levels · easy care
- 6 in adult
- 30+ gal
- 64–74 °F
- pH 7 to 8
- groups of 2+
Bloodfin tetra
Peaceful · Top · easy care
- 2.2 in adult
- 20+ gal
- 65–82 °F
- pH 6 to 8
- groups of 6+
Bubble eye goldfish
Peaceful · All levels · demanding care
- 4 in adult
- 30+ gal
- 65–74 °F
- pH 7 to 8
- groups of 2+
Buenos Aires tetra
Semi-aggressive · Middle · easy care
- 3 in adult
- 29+ gal
- 64–82 °F
- pH 6 to 8
- groups of 6+
Checker barb
Peaceful · Middle · easy care
- 2 in adult
- 20+ gal
- 64–77 °F
- pH 5.5 to 7.5
- groups of 6+
Comet goldfish
Peaceful · All levels · easy care
- 10 in adult
- 75+ gal
- 50–75 °F
- pH 7 to 8
- groups of 2+
Common goldfish
Peaceful · All levels · easy care
- 8.7 in adult
- 75+ gal
- 50–75 °F
- pH 7 to 8
- groups of 2+
Denison barb
Peaceful · Middle · moderate care
- 6 in adult
- 55+ gal
- 64–77 °F
- pH 6.8 to 7.8
- groups of 6+
Dojo loach
Peaceful · Bottom · easy care
- 10 in adult
- 55+ gal
- 55–77 °F
- pH 6.5 to 8
- groups of 3+
Everglades pygmy sunfish
Peaceful · Bottom · moderate care
- 1.3 in adult
- 5+ gal
- 55–80 °F
- pH 6.5 to 7.5
- groups of 2+
Fantail goldfish
Peaceful · All levels · easy care
- 8 in adult
- 30+ gal
- 64–74 °F
- pH 7 to 8
- groups of 2+
GloFish danio
Peaceful · Top · easy care
- 2 in adult
- 10+ gal
- 64–77 °F
- pH 6.5 to 8
- groups of 6+
Gold barb
Peaceful · Middle · easy care
- 2.8 in adult
- 20+ gal
- 64–75 °F
- pH 6 to 8
- groups of 6+
Least killifish
Peaceful · Middle · easy care
- 1.2 in adult
- 5+ gal
- 64–80 °F
- pH 7 to 8
- groups of 6+
Lionhead goldfish
Peaceful · All levels · moderate care
- 6 in adult
- 30+ gal
- 64–74 °F
- pH 7 to 8
- groups of 2+
Medaka
Peaceful · Top · easy care
- 1.5 in adult
- 10+ gal
- 65–82 °F
- pH 6.5 to 8
- groups of 6+
Oranda
Peaceful · All levels · easy care
- 8 in adult
- 30+ gal
- 64–74 °F
- pH 7 to 8
- groups of 2+
Paradise fish
Semi-aggressive · Top · easy care
- 3.5 in adult
- 20+ gal
- 61–79 °F
- pH 6 to 8
- one male per tank
Pearlscale goldfish
Peaceful · All levels · moderate care
- 8 in adult
- 30+ gal
- 65–74 °F
- pH 7 to 8
- groups of 2+
Peppered corydoras
Peaceful · Bottom · easy care
- 2.8 in adult
- 20+ gal
- 64–77 °F
- pH 6 to 8
- groups of 6+
Rainbow shiner
Peaceful · Middle · easy care
- 3 in adult
- 30+ gal
- 60–75 °F
- pH 6.5 to 8
- groups of 6+
Ranchu goldfish
Peaceful · All levels · moderate care
- 8 in adult
- 30+ gal
- 65–74 °F
- pH 7 to 8
- groups of 2+
Rosy barb
Peaceful · Middle · easy care
- 6 in adult
- 29+ gal
- 64–77 °F
- pH 6 to 8
- groups of 6+
Ryukin
Peaceful · All levels · easy care
- 8 in adult
- 30+ gal
- 64–74 °F
- pH 7 to 8
- groups of 2+
Shubunkin
Peaceful · All levels · easy care
- 12 in adult
- 75+ gal
- 50–75 °F
- pH 7 to 8
- groups of 2+
Variatus platy
Peaceful · Middle · easy care
- 2.8 in adult
- 15+ gal
- 61–75 °F
- pH 7 to 8.2
- groups of 3+
Cherry shrimp
Peaceful · Bottom · easy care
- 1.6 in adult
- 5+ gal
- 65–82 °F
- pH 6.5 to 8
- groups of 10+
Axolotl
Peaceful · Bottom · moderate care
- 9 in adult
- 20+ gal
- 60–68 °F
- pH 6.5 to 8
- alone or pair
Bladder snail
Peaceful · Bottom · easy care
- 0.6 in adult
- 5+ gal
- 64–82 °F
- pH 7 to 8.5
- alone or pair
Crystal red shrimp
Peaceful · Bottom · demanding care
- 1.2 in adult
- 10+ gal
- 62–76 °F
- pH 5.8 to 7.4
- groups of 10+
Dwarf orange crayfish
Semi-aggressive · Bottom · easy care
- 2 in adult
- 10+ gal
- 60–77 °F
- pH 7 to 8
- alone or pair
Electric blue crayfish
Aggressive · Bottom · easy care
- 5 in adult
- 20+ gal
- 65–78 °F
- pH 7 to 8
- one per tank
Ghost shrimp
Peaceful · Bottom · easy care
- 2 in adult
- 5+ gal
- 65–80 °F
- pH 7 to 8
- groups of 3+
Japanese trapdoor snail
Peaceful · Bottom · easy care
- 2 in adult
- 10+ gal
- 60–80 °F
- pH 7 to 8
- alone or pair
Malaysian trumpet snail
Peaceful · Bottom · easy care
- 1.2 in adult
- 5+ gal
- 64–86 °F
- pH 7 to 8
- alone or pair
Ramshorn snail
Peaceful · Bottom · easy care
- 1 in adult
- 5+ gal
- 64–82 °F
- pH 7 to 8
- alone or pair
No species on this list match those filters. Try a larger tank or clear a filter.
More fish lists
Fish for a 5 gallon tankFish for a 10 gallon tankFish for a 15 gallon tankFish for a 20 gallon tankFish for a 29 gallon tankFish for a 30 gallon tankFish for a 40 gallon tankFish for a 50 gallon tankFish for a 55 gallon tankFish for a 75 gallon tankFish for a 100 gallon tankFish for a 125 gallon tankBest fish for beginnersBetta tank matesGoldfish tank matesAngelfish tank matesShrimp-safe fishSchooling fishBottom-dwelling fishTop-dwelling fishAlgae eatersNano fishCenterpiece fishFish for hard waterFish for soft waterDither fishColorful freshwater fishAll fish
Names, and adult sizes where the article gives one, are checked against Wikipedia; care ranges are common hobby guidance, and each species page says which is which. 31 of these 41 are fish. Photos are real photographs from Wikimedia Commons, credited below; the lineup is our own drawing at one scale.
Photo credits
Real photographs from Wikimedia Commons, resized and cropped to fit; each is used under the license named.
- Zebra danio Roundish, CC0, via Wikimedia Commons
- Fancy goldfish Benson Kua, CC BY-SA 2.0, via Wikimedia Commons
- White cloud mountain minnow Petrtyl, CC BY 4.0, via Wikimedia Commons
- American flagfish nat_t (iNaturalist), CC0, via Wikimedia Commons
- Black moor Riyad Youssef, CC BY 2.5, via Wikimedia Commons
- Bloodfin tetra VGW2006, Public domain, via Wikimedia Commons
- Bubble eye goldfish Angie Torres from Toronto, CC BY-SA 2.0, via Wikimedia Commons
- Buenos Aires tetra Øyvind Holmstad, CC BY-SA 3.0, via Wikimedia Commons
- Checker barb Dodoni, CC BY-SA 3.0, via Wikimedia Commons
- Comet goldfish Michelle Jo (Humanfeather), CC BY 3.0, via Wikimedia Commons
- Common goldfish ぱたごん, CC BY-SA 3.0, via Wikimedia Commons
- Denison barb Anandarajkumar, CC BY-SA 3.0, via Wikimedia Commons
- Dojo loach PrinceNimblesoft, CC0, via Wikimedia Commons
- Everglades pygmy sunfish Brian Gratwicke, CC BY 2.0, via Wikimedia Commons
- Fantail goldfish Pogrebnoj-Alexandroff, CC BY 3.0, via Wikimedia Commons
- GloFish danio Karol Głąb (Karol007), CC BY-SA 3.0, via Wikimedia Commons
- Gold barb Fred Hsu, CC BY-SA 3.0, via Wikimedia Commons
- Least killifish Brian Gratwicke, CC BY 2.0, via Wikimedia Commons
- Lionhead goldfish Roderick Santos, CC BY 2.5, via Wikimedia Commons
- Medaka Seotaro, CC BY-SA 3.0, via Wikimedia Commons
- Oranda Lawrencekhoo, CC BY-SA 4.0, via Wikimedia Commons
- Paradise fish André Karwath; edited by Muhammad, CC BY-SA 2.5, via Wikimedia Commons
- Pearlscale goldfish Lerdsuwa, CC BY-SA 3.0, via Wikimedia Commons
- Peppered corydoras Przemysław Malkowski, CC BY 2.5, via Wikimedia Commons
- Rainbow shiner H. Zell, CC BY-SA 3.0, via Wikimedia Commons
- Ranchu goldfish Lerdsuwa, CC BY-SA 4.0, via Wikimedia Commons
- Rosy barb Kkonstan, CC BY 3.0, via Wikimedia Commons
- Ryukin Lawrencekhoo, CC BY-SA 4.0, via Wikimedia Commons
- Shubunkin Rodsan18 at English Wikipedia, CC BY 2.5, via Wikimedia Commons
- Variatus platy Marrabbio2, CC BY-SA 3.0, via Wikimedia Commons
- Cherry shrimp TheJammingYam, CC BY-SA 3.0, via Wikimedia Commons
- Axolotl LoKiLeCh, CC BY-SA 3.0, via Wikimedia Commons
- Bladder snail Dat doris, CC BY-SA 4.0, via Wikimedia Commons
- Crystal red shrimp DirkBlankenhaus, CC BY-SA 3.0, via Wikimedia Commons
- Dwarf orange crayfish HellSpawn754, CC0, via Wikimedia Commons
- Electric blue crayfish Dirk Rohlfs, Public domain, via Wikimedia Commons
- Ghost shrimp Smithsonian Environmental Research Center, CC BY 2.0, via Wikimedia Commons
- Japanese trapdoor snail Judy Gallagher, CC BY 2.0, via Wikimedia Commons
- Malaysian trumpet snail Buchling, CC BY-SA 3.0, via Wikimedia Commons
- Ramshorn snail Dat doris, CC BY-SA 4.0, via Wikimedia Commons
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