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
Bunguran rasbora
Rasbora bunguranensis
Rasbora bunguranensis is a small, schooling Rasbora from Indonesia's Natuna Besar (Bunguran) Island. It stays pretty modest in size (about 8 cm standard length), so it fits that classic Rasbora vibe: active midwater cruising and happiest when you keep a proper group so they feel confident.
Busuma tilapia
Tilapia busumana
Tilapia busumana is a West African cichlid from Ghana/Côte d’Ivoire drainages (including Lake Bosumtwi). It is a pair-bonding, open-substrate spawner with biparental brood guarding.
Buytaert's killifish
Aphyosemion buytaerti
Think of this one as the cool-water forest killi from Central Africa. Males show fine yellow spotting with blue trim on the fins and they perk right up once settled, but they can hassle each other, so a pair or trio works best. They really shine in soft, clean, slightly acidic water kept on the cool side.
Cahita sucker
Catostomus cahita
A river sucker from northwestern Mexico, it spends its days rooting through gravel for insect larvae and algae and hanging out in steady current. Not flashy, but it is a sturdy, torpedo-shaped fish with a neat downturned mouth and lots of personality once it settles in. It gets too big for most tanks and really appreciates cool, clean, well-oxygenated water.
Cahual tridentine catfish
Tridentopsis cahuali
Tridentopsis cahuali is one of those truly tiny South American pencil catfishes - think around 2 cm, basically a living sliver. It is from the Paraguay River basin, and its whole vibe is secretive micro-catfish life in warm freshwater. Real talk: there is very little hobby-grade care info out there, so I would treat it like a delicate specialty fish and plan on a species tank and careful observation.
Calabazas shiner
Aztecula calabazas
Aztecula calabazas is a tiny Mexican shiner/minnow from the Rio Panuco basin, basically a little stream fish that spends its whole life in a very small area. Its big claim to fame is how localized and rare it is - this is one of those species thats more of a conservation fish than a normal aquarium fish you see for sale.
Caohai stone loach
Eonemachilus caohaiensis
This is a tiny Chinese stone loach from high-elevation Caohai Lake in Guizhou, and it is basically a bottom-hugging little noodle that wants clean, well-oxygenated water. It is not something you will see in the trade much, but if you ever did, I would treat it like other small cool-water nemacheilid loaches: lots of cover, smooth sand, and steady filtration.
Cape Fear shiner
Notropis mekistocholas
This is a tiny, super-local North Carolina shiner from the Cape Fear River basin, and it has a weirdly long, coiled gut for a shiner because it can make a living on a lot of plant-y, detritus-type foods. In the wild it hangs around rocky and sandy pools and runs and often schools up with other minnows, plus it shifts into slower pools to spawn in late spring into summer.
Caqueta whiptail catfish
Sturisoma caquetae
Sturisoma caquetae is one of those sleek, sturgeon-bodied whiptails that just glides around like a little underwater paper airplane. It stays pretty slim and spends its time clinging to hard surfaces and grazing biofilm, so it does best in a mature, super-clean tank with good flow and oxygen.
Cardinal Tetra
Paracheirodon axelrodi
The Cardinal Tetra is a small, vibrant freshwater fish known for its striking iridescent blue and red coloring. It is closely related to the Neon Tetra but can be distinguished by the extended red stripe that runs the entire length of its body. People love keeping Cardinal Tetras in their tanks because they're peaceful and great at schooling together.
Carens barb
Enteromius carens
Enteromius carens is a small freshwater cyprinid from West-Central Africa. It is known from the Kouilou basin to the Chiloango basin (Republic of the Congo, Cabinda/Angola, and DR Congo), with a single record from the Foulakari River in the lower Congo basin. Maximum recorded size is about 3.2 cm standard length.
Carvalho's tetra
Tetragonopterus carvalhoi
This South American characin is described from northern Brazil (rio Jari, Amazon basin) and reaches about 6.5 cm SL. It is distinguished from congeners by a lozenge-shaped dark spot on the caudal peduncle.