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
San Marcos redtail splitfin
Xenotoca doadrioi
This is a little Mexican goodeid livebearer where the males do that awesome "blue body + orange/red tail" thing when they color up. They're super active, always grazing and pecking at surfaces, and they really appreciate cooler, clean, well-oxygenated water compared to your typical tropical livebearers.
Saul's whale catfish
Denticetopsis sauli
This is one of those ultra-tiny South American whale catfish that most people will never see in the trade - it tops out around 2 cm. Its whole vibe is "secretive little bottom-hanger" from blackwater-style habitats, so in an aquarium it would spend a lot of time tucked into leaf litter and small caves if you could even source one.
scale-eater, Malawian
Docimodus johnstoni
Docimodus johnstoni is a Lake Malawi hap with unusual feeding ecology: in the wild it is documented to bite the fins of clariid catfishes and may remove scales/skin, making it fascinating biologically but unsuitable for most community aquaria.
Schmidt's hillstream catfish
Glyptothorax schmidti
This is one of the little Asian hillstream catfish that lives in fast, cool, super-oxygenated water and literally clings to rocks with a sticky belly pad. In an aquarium its whole vibe is "powerhead + smooth stones + pristine water," and if you nail that setup its rock-hugging behavior is seriously cool to watch.
Seerüssling
Vimba elongata
Vimba elongata (Seerüssling) is a temperate European cyprinid from the upper Danube basin, with populations in subalpine lakes of southern Bavaria and Upper Austria. It is a slim, silvery, benthic forager that roots for small invertebrates.
Serpae Tetra
Megalamphodus eques
Serpaes are those fiery little red tetras with the black "comma" behind the gill-super eye-catching in a planted tank. They're active and a bit spicy, so they do best in a real group where they'll squabble with each other instead of nipping slower tankmates. When they're settled in, you get this constant cruising-and-chasing vibe that makes the tank feel really alive.
Sete Quedas eartheater
Gymnogeophagus setequedas
This is a smaller South American eartheater cichlid from the Parana River basin, and its vibe is classic Gymnogeophagus: cruising the bottom, picking at the substrate, and doing that cool biparental fry-guarding thing. It stays under 4 inches, but it still acts like a real cichlid when pairing up, so giving it space and some structure matters.
Sheepshead swordtail
Xiphophorus birchmanni
A wild swordtail from eastern Mexico that loves fast, splashy streams and shows off bold vertical bars and a big, yellow-speckled dorsal. Males barely carry a sword at all, which always surprises folks, but they make up for it with tons of personality when kept in a roomy, well-oxygenated tank.
Shiloango spiny eel
Mastacembelus shiloangoensis
A neat little African spiny eel from the Shiloango River basin, it stays around 6 inches and shows a row of inky spots along the back. It loves to bury itself in fine sand and come out at dusk for worms and tiny crustaceans, so a soft substrate and tight lid make life way easier.
Short-bodied white-armored fish
Onychostoma breve
Onychostoma breve is a small river carp from the Yangtze River system in China, topping out around 14.6 cm standard length. Its whole vibe is a streamlined, current-loving minnow that wants lots of oxygen and moving water, so it is way happier in a river-style setup than a typical calm community tank.
Short-sword platyfish
Xiphophorus continens
Xiphophorus continens is a tiny little wild-type livebearer from the Rio Panuco drainage in Mexico, and the males have just a short "stub" sword instead of the big flowing one you see on common swordtails. They really shine in a planted, oxygen-rich tank with some current, where you can watch the males do their low-key "sneaker" style mating behavior and the females quietly cruise the plants.
Short Zaireichthys (dwarf loach catfish)
Zaireichthys brevis
Zaireichthys brevis is a tiny little African loach catfish from the Congo River basin - think "micro catfish" that spends its time down on the bottom. Its wild habitat is sandy stretches of big river, so it tends to appreciate fine sand and some rocks/cover, and it is more of a look-and-enjoy species than an interactive pet.