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
Chocolate-colored catfish
Rineloricaria lanceolata
This is a slim little whiptail (a Loricariid) that spends most of its time gliding over sand and leaves, picking at biofilm like a tiny vacuum cleaner. Give it driftwood, caves, and calm tankmates and it turns into a super chill, sneaky-bottom-dweller with that awesome long whip tail and high dorsal fin.
Clouded archerfish
Toxotes blythii
This is the freshwater archerfish that does the whole "shoot water at bugs" thing, and it is ridiculously fun to watch once they settle in. They are surface-oriented, quick, and kind of predatory in that "if it fits, it might get eaten" way, so you plan tankmates around their mouth size. Give them clean, well-oxygenated water and a tight lid, and they act like little hunters all day.
Clown loach
Chromobotia macracanthus
Clown loaches are those orange fish with the chunky black bands that act like total goofballs-piling into the same cave, clicking at each other, and sometimes doing that "am I dead?" sideways nap. They stay way calmer and more confident in a proper group, and once they're settled they'll spend all day cruising the bottom and sifting around for snacks.
Cobalt blue goby
Stiphodon semoni
Stiphodon semoni is one of those little river gobies that spends its whole day perched on rocks, scooting around, and grazing biofilm/aufwuchs like a tiny underwater goat. Give it clean, oxygen-rich water and a nice algae-y rockscape, and the males especially can look unreal with that blue-green sheen and bands.
Common otocinclus
Otocinclus vittatus
O. vittatus is that tiny little "oto" you see plastered to plant leaves and the glass, just quietly vacuuming up soft algae and biofilm all day. The big trick with them is they're amazing grazers, but they can absolutely run out of food in a too-clean/new tank, so you've got to plan on supplementing with algae wafers/blanched veg.
Common river galaxias
Galaxias vulgaris
Think of the common river galaxias as a little New Zealand stream ninja. It spends the day tucked under cobbles and comes out at dusk to pick drifting insects, so a cool, fast-flowing, high-oxygen setup suits it way better than a tropical tank.
Compact sand catlet
Zaireichthys compactus
This is one of those tiny African sand-dwelling loach catfish that likes to hug the bottom and vanish into the substrate. In the wild it comes from fast-flowing, muddy-brown water with mixed sand, mud, and rocky areas, so in a tank it really appreciates flow, oxygen, and a soft sandy spot to scoot around on.
Compressiceps dwarf pike cichlid
Wallaciia compressiceps
This is one of those tiny pike cichlids that looks cute until you watch it start running the tank like a little biting terrier. It stays small, but it is a real predator with a ton of attitude, and it gets especially spicy with its own kind when pairs form.
Congo Ichthyborus
Ichthyborus congolensis
Ichthyborus congolensis is one of those Congo basin oddball characins with that long, predatory-looking snout - built for grabbing smaller fish and bugs in open water. Its a real "niche" species in the hobby, so most of the time youre planning a tank for its size and behavior (active, boisterous, potentially fin-nippy) rather than following a super-established community-fish care recipe.
Copper mahseer
Neolissochilus hexagonolepis
A large mahseer (torinine cyprinid) from fast, rocky rivers of South and Southeast Asia. Adults can reach ~120 cm TL, and the species favours cool, highly‑oxygenated, strong‑current habitats—conditions that require very large aquaria or ponds; it is generally unsuitable for typical home aquariums.
Cordoba livebearer
Jenynsia obscura
A small onesided livebearer from central Argentina, the Cordoba livebearer stays petite and does great in cooler, well-oxygenated freshwater. Males have that quirky one-sided gonopodium and the group shows lots of personality when kept as a small colony.
Creek livebearer
Jenynsia eigenmanni
Jenynsia eigenmanni is a little South American livebearer from southern Brazil, and it has that classic Jenynsia "one-sided" mating setup, which is pretty wild to watch once you keep a group. It's not a showy neon fish, but it is super active and always cruising and grazing, more like a tiny, tougher molly-type fish that stays busy all day.