Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 541 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.
Himachal stone loach
Schistura himachalensis
This is a tiny Himalayan hillstream Schistura that stays close to the bottom and spends its day nosing around between gravel and stones. In a tank they do best when you set it up like a little fast creek - lots of oxygen, clean water, and a bunch of rock piles so they can claim personal space.
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.
Hypostomus scaphyceps (suckermouth armored catfish)
Hypostomus albopunctatus
This one is a wild Brazilian Hypostomus from the Paranapanema River basin - basically a true armored suckermouth catfish, not something you usually see labeled clearly in shops. One big gotcha: the often-quoted max size of 3.5 cm is very likely based on a juvenile record, so I would not plan a tiny tank around it.
Hypsolebias trifasciatus
Hypsolebias trifasciatus
Tiny but flashy, this annual killi lights up with a blue body and bold yellow-and-black striping on the anal fin. It comes from shallow seasonal pools in northeastern Brazil, so it likes soft, warm water and will bury eggs in a peat or mud-like substrate. Males have big attitudes for such small fish, so plan for line-of-sight breaks or keep a single pair.
Hyrtl's catfish
Neosilurus hyrtlii
This is an Aussie eel-tail catfish that looks like a sleek little catfish-meets-eel, especially when it flashes those yellow fins. It spends a lot of time cruising the bottom and hoovering up meaty bits, and it can get way bigger than people expect if you keep it well fed and give it swimming room.