Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 337 species
Highland swordtail
Xiphophorus malinche
Xiphophorus malinche is a smaller, cooler-water swordtail from fast, clear rivers in Mexico, and the males can show a really neat golden-brown look with blue/purple sheen plus a short yellow sword. It is a livebearer, but it is not the "toss it in a warm community tank" kind of swordtail - it does best kept cool with very clean, oxygen-rich water.
Honey gourami
Trichogaster chuna
Honey gouramis are those little chill labyrinth fish that spend a lot of time cruising the upper half of the tank and "feeling" around with their long thread-like belly fins. Give them plants (especially floaters) and calm tankmates and they really settle in-males can glow that warm honey/orange color and will build bubble nests at the surface.
Horizontal stripe Yunnan loach
Yunnanilus spanisbripes
A small stone loach endemic to the Niulanjiang River in Yunnan, China (upper Yangtze basin). Females show a single dark lateral stripe while males are blotched or spotted. Rare in the trade; if kept, provide clean, well‑oxygenated water, fine sand, and modest current, as with other Yunnanilus loaches.
Hovering Zebra Loach
Yunnanilus cruciatus
This tiny Vietnamese stone loach is a little weirdo in the best way - it often cruises head-down at about a 45-degree angle and will "hover" in the water column while it hunts for snacks. Keep it in a proper group and a planted, mature tank, and you get constant small-fish activity without the drama.
Howes' prodontocharax
Prodontocharax howesi
This is a tiny Amazon-basin cheirodontine characin associated with unusual jaw/tooth morphology in the Prodontocharax/Amblystilbe group. Recent revisionary work revalidated the genus Amblystilbe and treats Amblystilbe howesi as distinct; older secondary sources may list the fish under Prodontocharax howesi, so identification and naming can be inconsistent in non-specialist contexts.
Htamanthi danio
Danio htamanthinus
This is a truly tiny Myanmar danio from little streams around Htamanthi in the Chindwin River basin. It stays under an inch, so it feels more like keeping a bunch of shimmering micro-fish than a typical zebra-danio-style "speedster". Give it plants, calm tankmates, and a group big enough that it feels secure and you will see much nicer, bolder behavior.
Huangwei gu (黄尾鲴)
Xenocypris davidi
Xenocypris davidi is a Chinese river fish that gets way bigger than most folks expect from a "minnow-looking" cyprinid - it's a sleek, open-water swimmer that can hit real dinner-plate size. In the wild it's a benthopelagic species and even shows up in slightly brackish areas, so it's pretty adaptable, but it's not really an everyday home-aquarium fish because of its adult size and need for swimming room.
Hubei sharpbelly
Xenocypris hupeinensis
Xenocypris hupeinensis is a freshwater sharpbelly (family Xenocyprididae) endemic to China, reported from the middle and upper reaches of the Changjiang (Yangtze) River system, with a maximum recorded length of about 25.6 cm TL. Aquarium husbandry information appears scarce in mainstream hobby references; any care guidance should be treated as extrapolation from similar open-water cypriniform fishes rather than species-specific data.
Iberian arch-mouthed nase
Iberochondrostoma lemmingii
This is a temperate Iberian river leuciscid that typically inhabits middle-to-lower river reaches with weak to moderate current and abundant aquatic vegetation. It feeds largely on algae/detritus and also zooplankton and small aquatic invertebrates. It is a native conservation-interest species in parts of its range and is not commonly encountered in the aquarium trade.
Imparfinis catfish
Imparfinis piperatus
Imparfinis piperatus is a tiny Brazilian heptapterid catfish that spends its time down on the bottom, scooting around like a little stream goblin. It stays really small (around 3.2 cm SL max), and the neat part is the subtle mottled/striped look and those long barbels that make it look way more "catfish" than its size suggests. Not super common in the aquarium trade, but it is a cool pick if you are into South American stream setups.
Imparfinis cochabambae
Imparfinis cochabambae
A little three-barbeled catfish from the upper Madeira-Beni system, this guy hugs the bottom and zips between stones once the lights go low. Keep it in clean, well-oxygenated flow with plenty of hiding spots and it will come out for sinking meaty foods. It stays small, so a calm community of similar-sized fish works nicely.
Indian glassy fish
Parambassis ranga
This is the classic see-through "glassfish" where you can literally see the bones and organs-super cool in a planted tank with calm tankmates. They're happiest when you keep a little crew of them (they get braver and way more active in a group). Also: skip any dyed/painted ones-those fish are usually in rough shape from the process.