Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Water Type
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 303 species
Yaoshania pachychilus
Hillstream loach from fast, highly oxygenated mountain streams; thrives in a mature, algae/biofilm-rich river-style aquarium with strong flow and smooth rocks. Peaceful but social, and best kept in groups where they become more active and confident.
Rhamphichthys pantherinus
This is a weakly-electric South American sand knifefish (family Rhamphichthyidae) with a long tubular snout. It is associated with soft-bottom habitats and is largely bottom-oriented; provide a soft sand substrate and secure cover. Note that some authorities have treated Rhamphichthys pantherinus as a synonym of Rhamphichthys marmoratus (provisionally), so older sources may use different names.
Xenotilapia papilio
Xenotilapia papilio is a small Lake Tanganyika cichlid that feeds by taking in mouthfuls of sediment/sand and filtering out tiny invertebrates. It inhabits rocky areas with sand (rock–sand transition zones) and shows biparental mouthbrooding, with adults forming territories/pairs during reproduction.
Leporinus paranensis
Leporinus paranensis is a smaller Leporinus from the Parana River basin - think quick, curious headstander vibes without getting into the really big, tank-busting sizes some relatives hit. In the wild it breeds in pairs around dense weeds, so it tends to appreciate cover and structure even though it still wants room to cruise.
Paragoniates alburnus
Paragoniates alburnus (often called the pasca) is a slim, silvery Amazon characin that tops out around 6-7 cm. Its vibe is very much "open-water, always on the move," so it does best in a roomy tank with a current and a group of its own kind.
Tateurndina ocellicauda
Peacock gudgeons are little jewel-fish from eastern Papua New Guinea with that awesome "eye spot" on the tail and a ton of blue/yellow/red speckling. They're gentle most of the time, but the males get pretty into cave/crevice territory when they're thinking about spawning-and watching the male guard and fan eggs is seriously cool.
Ituglanis amphipotamus
This is a small, secretive trichomycterid catfish from southeastern Brazil that hugs the bottom and likes to wedge itself into tight spots. It comes from fast-flowing water over rock and sand, so it does best in a well-oxygenated setup with current and lots of little caves or crevices to vanish into.
Oxynoemacheilus persa
This is a little bottom-hugging stone loach from Iran that spends its time cruising the substrate and poking around for food. It does best when you set the tank up like a cool, clean stream - lots of oxygen, flow, smooth rocks, and hiding spots - and you will see way more natural behavior.
Hyphessobrycon peruvianus
Hyphessobrycon peruvianus is a small Upper Amazon tetra from Peru that really comes alive in a proper group - the shoaling is the whole point with this one. Keep it in soft-ish, slightly acidic water and it will stay active and calm, with that classic Hyphessobrycon vibe of always being in motion without being a jerk.
Jabarichromis pfefferi
This is a Lake Tanganyika predator that cruises the sand-rock transition zones and picks off shrimp and other little inverts. It is not a neon show-fish - more of a subtle, tough, hunting-style cichlid with a cool mouthbrooding setup. Give it space, hard alkaline water, and a sandy bottom and it will act like it owns a big chunk of the tank.
Nomorhamphus celebensis
This is a cool little Sulawesi halfbeak that spends most of its time cruising the surface and picking food right off the top. They do best in a small group with lots of surface cover (floating plants are perfect), and they really reward you if you keep the water clean and stable. Also worth knowing: a lot of info online mixes up their exact habitat, and that can lead people to keep them too warm.
Hypselobarbus pseudomussullah
This is a Western Ghats river barb from India that gets to a solid hand-sized fish, built for cruising midwater in current. Its whole claim to fame is how close it looks to Hypselobarbus mussullah - it was literally described as the 'pseudo' mussullah - so it is the kind of fish that can be mis-ID'd in the trade if it ever shows up.