Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 451 species
Aboina barb
Enteromius aboinensis
Enteromius aboinensis (the Aboina barb) is a small West African barb with a clean black midline stripe and a little spot right at the base of the tail. It does best when you treat it like a proper schooling fish - keep a decent group and give it plants around the edges with open swimming room in the middle.
Ajuricaba tetra
Jupiaba ajuricaba
Jupiaba ajuricaba is a South American freshwater characin from the Amazon basin in Brazil (rio Negro, rio Solimões, and rio Tapajós basins). It reaches about 9.5 cm SL and is diagnosed by a narrow dark midlateral stripe, an elongated humeral spot, and an ocellated spot on the upper caudal-fin lobe. Wild specimens have been collected from blackwater forest streams and also oxbow-lake habitats.
Allen's river garfish
Zenarchopterus alleni
A poorly known freshwater halfbeak endemic to West Papua (Mamberamo River), described from a single specimen (~13 cm SL). Beyond basic habitat/occurrence, little is published about its ecology or aquarium suitability; assume it is a surface-oriented, jump-prone halfbeak only by analogy with related taxa.
Altipedunculata stone loach
Schistura altipedunculata
Schistura altipedunculata is one of those little stream loaches that wants clean, well-oxygenated water and a bunch of rock nooks to claim as home. It is a bottom-hugger that will spend its day scooting from crevice to crevice, and it tends to get a bit spicy with its own kind if you do not give it enough hiding spots.
Amapa tetra
Hyphessobrycon amapaensis
This is a tiny, super sleek little tetra with a clean red stripe down the side that really pops once its settled in. It does best in a planted, slightly tinted "creek-style" setup and looks way cooler when you keep a proper group so they school and flash that line together. If you can give it soft, slightly acidic water and a calm community, its an easy fish to fall for.
Amatlan chub
Yuriria amatlana
Yuriria amatlana (the Amatlan chub) is a little Mexican native minnow from the Ameca River basin. Its wild range is pretty limited and it is listed as Endangered, so its care info in the aquarium hobby is basically nonexistent and its availability is usually low. In the original species description, preserved fish show a dark lateral stripe with a darker patch on the caudal peduncle, and they can have tiny barbels at the mouth corners.
American flagfish
Jordanella floridae
Jordanella floridae is that little Florida native with the red-and-cream striping that really does look like a tiny flag once a male colors up. They graze algae like champs (especially stringy/hair algae), but they have a bit of attitude - give them plants and space so the bossy behavior stays manageable. Bonus: the male guards the eggs and will actively fan them, which is pretty fun to watch.
Amur sculpin
Alpinocottus szanaga
This is a little coldwater sculpin from the Amur drainage - a bottom-hugging, rock-and-gravel fish that spends its day wedged under stones and darting out to grab food. Super cool behavior and attitude, but it is absolutely not a warm tropical community fish - it wants chilly, fast, oxygen-rich water and will bicker with other bottom fish.
Andrica moenkhausia
Moenkhausia andrica
Moenkhausia andrica is a little Brazilian characin from the Tapajos system that tops out around 7 cm (about 2.8 inches) standard length. It has a neat netted (reticulated) scale pattern plus a dark spot on the caudal peduncle, and the really wild part is that mature females can have tiny fin hooklets too, which is usually a male-only thing in a lot of characins.
Anhanga pygmy pencil catfish
Potamoglanis anhanga
This is a truly tiny Amazonian trichomycterid catfish - like 1.3 cm max - so it is more of a micro-predator oddball than a typical community catfish. It is the kind of fish that disappears into sand, leaf litter, and plant roots, and you will spend way more time setting up the right micro-habitat than you will actually seeing it.
Anitápolis livebearer
Jenynsia weitzmani
Jenynsia weitzmani is a freshwater anablepid livebearer endemic to southern Brazil (currently known only from the type locality near Anitápolis, Santa Catarina). Like other Jenynsia (onesided livebearers), reproduction involves lateralized mating morphology/behavior; aquarium care guidance is not well-documented for this species specifically.
Anteridorsal Homatula loach
Homatula anteridorsalis
This is a benthic Chinese stream loach from Yunnan that lives right down on the bottom in clear, flowing water over gravel and rocks. Think of it as a "river tank" fish - it wants current, oxygen, and lots of surfaces to poke around on for bits of food and algae.