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 356 species
Moenkhausia aurantia
This is a little Brazilian Moenkhausia tetra described in 2011 from clear, shallow streams in the upper rio Tocantins basin. In the wild it turns up around rocky/sandy bottoms with riparian vegetation, and its name (aurantia) is literally a nod to an orangish tone. It is not a common aquarium fish, so most keepers end up treating it like a small, schooling South American tetra and focusing on stability and a calm setup.
Forsterygion malcolmi
This is a little New Zealand temperate reef triplefin that spends its time parked on rockwork, peeking out from overhangs and holes like a tiny goby-meets-blenny. It is a crustacean-and-snail picker in the wild, and its whole vibe is "hang close to cover and watch everything" - super cool if you like natural behavior more than flashy open-water swimming.
Xiphophorus nezahualcoyotl
This is a cool little wild-type swordtail from Mexico that likes it a bit cooler than the typical pet-store swordtail. Males can do a quirky "headstand" display during courtship and squabbles, and in a roomy tank they stay active and busy without being total jerks.
Owstonia merensis
Owstonia merensis is a tiny deepwater bandfish from the western Pacific - think slope/reef-edge trawl depths, not a reef tank fish. It stays small (around 5.7 cm standard length in the literature) and lives way down where water is cool, dark, and super stable, which is why it is basically never a realistic home-aquarium species.
Gobiodon acicularis
This is that tiny, jet-dark coral goby with the cool needle-like first dorsal spine - it basically lives tucked into branching corals and just perches all day like it owns the place. Super cryptic and chill, but it is way happier (and easier to keep eating) when it has a real coral head or tight branching structure to call home.
Microdevario kubotai
This is that tiny, glassy-yellow fish that turns into a little green highlighter once it settles into an aquarium-especially over a dark substrate and under decent lighting. They're super active mid-water shoalers, and the whole group "flashing" that neon stripe together is the main event. Keep them in a proper group and they get way bolder and look a lot more intense.
Paracheirodon innesi
The Neon Tetra is a small, brightly colored fish known for its vibrant blue and red stripes that run the length of its body. It is a favorite among aquarists due to its striking appearance and peaceful nature. Neon Tetras are schooling fish that thrive in groups, adding a lively and colorful presence to any aquarium.
Pungitius pungitius
The ninespine stickleback is a small, slender stickleback with multiple short dorsal spines and a silvery to brownish body that often shows subtle mottling. Males can develop darker coloration and enhanced contrast during breeding and may become more territorial while guarding a nest. It is adaptable to cool, well-oxygenated water and is best kept with similarly temperate species rather than tropical community fish.
Yunnanilus niulanensis
Yunnanilus niulanensis is a small freshwater stone loach (Nemacheilidae) described from the upper Niulanjiang River (a branch of the Jinsha River) in Songming County, Yunnan, China. It is characterized by large brown spots on the upper two-thirds of the body and head; aquarium availability and husbandry are not well-documented in authoritative sources.
Schistura nomi
Schistura nomi is one of those little river loaches that wants brisk, clean, oxygen-rich water and a bottom full of rounded gravel and stones to poke around in. Its whole vibe is hanging in riffles and darting between rock cracks, so it really shines in a high-flow, hillstream-style setup.
Fundulus catenatus
Northern studfish are big, tough native killifish from clear creeks and rivers in the southcentral US, and the males get absolutely wild colors when they're in breeding mode. They cruise the midwater and surface like little torpedoes, but they are still stream fish at heart - clean, well-oxygenated water and room to swim makes all the difference. If you like active fish with real personality (and a bit of attitude), this one is a blast.
Amphiprion ocellaris
Ocellaris clowns are that classic orange clownfish look-three white bars, a little black edging, and a ton of attitude packed into a small fish. They'll "pick a spot" in the tank (often a corner or a coral) and do that cute hover-wiggle thing, and a bonded pair will usually settle in fast and act like they own the place.