Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 555 species
Twoarm humpback anglerfish
Dibrachichthys melanurus
This is a tiny, uncommon little anglerfish relative from northern Australia/Indonesia that hangs out on sandy-mud and rubble bottoms. Think of it like a mini ambush predator that spends its time sitting still and blending in, not cruising around the tank. It is super cool in a nerdy way, but it is absolutely not a normal aquarium species you will see in the trade.
Twosaddle Corydoras
Corydoras weitzmani
Weitzman's cory is one of those super sleek Corydoras that looks like it's wearing a little mask-clean lines, subtle patterning, and that classic cory "busy little vacuum" vibe. The best part is watching a whole group cruise the bottom together, then suddenly zip to the surface for a gulp of air like tiny torpedoes.
Ubirajara rivulus (killifish)
Melanorivulus ubirajarai
This is a tiny Cerrado rivulus from central Brazil - the males show off neat red chevron-like markings, and they are always cruising the top and edges looking for snacks. Like a lot of Melanorivulus, it is a jumpy little personality fish that does best in a tight-lidded, plant-heavy setup with gentle flow.
Upside-down Catfish
Synodontis nigriventris
The upside-down catfish is a small African mochokid catfish famous for swimming and feeding belly-up, especially under cover and along the water's surface. It has a light belly (often with darker spotting), a darker back, and prominent barbels, and it is most active at dusk and night. Peaceful overall, it does best in groups with plenty of hiding places like driftwood and caves.
Urosema dwarf pike cichlid
Wallaciia urosema (S. O. Kullander, 1990)
Rheophilic (current-loving) dwarf pike cichlid from Brazil’s Tapajós system; a small, territorial predator (to ~6.8 cm SL) that benefits from strong filtration/oxygenation, broken sightlines, and plenty of bottom cover (wood/rocks/caves).
Validus barb
Enteromius validus
Enteromius validus is a little Congo Basin barb that stays under 4 inches, with a chunky, sturdy body and proper barbels. Its wild diet is basically "whatever shows up" (insects, plant bits, seeds), so it is built for picking and browsing all day. This one is pretty obscure in the aquarium hobby, so most people keeping it are kind of blazing their own trail.
Vanmanenia gymnetrus (hillstream loach)
Vanmanenia gymnetrus
This is one of those true hillstream loaches built to live plastered onto rocks in fast current. It spends its time scooting around surfaces and grazing biofilm, and it really comes alive in a high-oxygen "river tank" setup. Not a "warm, still community tank" fish - it wants flow and clean water to look its best.
Variegated cardinalfish
Fowleria variegata
This is a small, mottled reddish-brown cardinalfish that likes to hang around rockwork and rubble and really comes into its own once the lights dim. In a calm reef tank its a super chill, slow swimmer, and if you keep a small group they tend to hover together and look way more natural.
Veilfin tetra
Hyphessobrycon elachys
This is one of those tiny Paraguay-basin tetras that looks kind of understated until the males mature and start throwing those longer, flowy fins - then it gets really classy. Keep them in a proper little group and theyll spend the whole day hovering and cruising the midwater, looking extra sharp over dark substrate and plants.
Velvety sole
Brachirus villosus
This is a true freshwater sole from New Guinea that spends most of its life glued to the bottom and buried in soft sand. It is one of those blink-and-you-miss-it fish during the day, then you catch it cruising the substrate at feeding time looking for meaty bits.
Vietnamese bitterling
Acheilognathus fasciodorsalis
Acheilognathus fasciodorsalis is a freshwater bitterling endemic to Vietnam. Like other bitterlings (Acheilognathidae), reproduction involves females using an ovipositor to deposit eggs in freshwater mussels.
Virgatula dwarf pike cichlid
Wallaciia virgatula
This is one of the little "dwarf" pike cichlids (recently moved out of Crenicichla into Wallaciia), so you get that sleek pike-cichlid look and attitude in a genuinely small package. Expect a smart, ambushy micro-predator vibe - it will hang around cover, watch everything, then dart in like a mini torpedo when food hits the water.