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 365 species
Knipowitschia punctatissima
This is a tiny little freshwater goby from northern Italy that spends most of its time glued to the bottom, scooting between sand, gravel, and cover. In the wild it is tied to cool, clear spring-fed habitats, so it does best in an oxygen-rich tank with gentle flow and lots of little hiding spots. Its size is cute, but its needs are kind of specific, and its wild status makes it a fish I would not treat as a casual impulse buy.
Callionymus izuensis
This is a little Japanese sand-dwelling dragonet from around the Izu Islands. Think of it as a bottom-hopper that hangs out on coarse sand and rubble and spends its time picking at tiny critters like most dragonets do. Super cool fish, but it is really more of a niche, species-tank kind of project than a casual community add.
Delminichthys jadovensis
This is a tiny karst-stream minnow that lives in just a sliver of Croatia, and it actually ducks into subterranean waters (or hides in mud) when conditions get rough. Its whole life is tied to super clear, slow-flowing streams, so it is more of a conservation fish than something you will realistically see for sale.
Jenynsia onca
Jenynsia onca is an unusual anablepid livebearer often called a one-sided livebearer; males have an asymmetrical gonopodium and mating may involve lateralized positioning (though some sources dispute strict left/right-only pairing). In aquaria they are active schooling fish that prefer cooler, well-oxygenated water and are best kept in groups.
Zenion japonicum
Zenion japonicum is a small deepwater dory from way down on the continental slope - silvery, big-eyed, and kind of "alien-cute" in that zeiform way. This is not an aquarium fish in any normal sense (it lives hundreds of meters deep in cold water), but it is a really neat bycatch species with that classic dory shape and spiny fins.
Gerres equulus
Gerres equulus (Japanese silver-biddy) is a temperate, demersal coastal mojarra from the northwest Pacific (southern Korea to southern Japan), typically over sandy shallows; it is generally reported as absent from the Ryukyu Islands. It is primarily a coastal fish and is not commonly maintained in home aquaria; if kept, provide ample open swimming space and stable marine conditions.
Jupiaba pinnata
Jupiaba pinnata is a small South American characin from the Guianas that stays around 5.8 cm standard length. Its vibe is very "tetra-like" - quick, active, and happiest when its kept in a proper group with open swimming space and some cover.
Corymbophanes kaiei
Small loricariid catfish from the Upper Potaro (Potaro River drainage above Kaieteur Falls) in Guyana; described as having distinct alternating light/dark bands on the caudal fin and diagnostic armored-pleco morphology.
Ilisha kampeni
Kampen's ilisha is a small, silvery coastal herring-relative that cruises nearshore waters and will also push into rivers when it feels like it. Its whole vibe is fast, open-water, plankton-and-small-fish hunting - not really a cozy planted-tank fish, more like a little pelagic sprinter that wants room and current.
Enneacampus kaupi
Enneacampus kaupi is a skinny little West African pipefish that likes to lurk through algae and basically cosplay as a piece of vegetation. Its whole vibe is slow, sneaky, and ultra-picky at feeding time - super cool if you enjoy target-feeding and watching hunting behavior up close. It shows up from brackish estuaries and coastal rivers, so a slightly brackish setup is often the safest long-term direction.
Ulvicola sanctaerosae
This is a skinny little kelp-forest perch that literally hangs out up in the kelp canopy and chills on the fronds. One of the coolest bits is how it uses its tail to wrap onto kelp like a grip, then picks off tiny crustaceans drifting by. Not really an aquarium trade fish, but its a super neat West Coast oddball if you ever see one while diving.
Zebrias keralensis
This is a small, sand-hugging marine sole from the Kerala coast area, with that classic zebra-style banding that helps it vanish the second it settles onto the bottom. Its whole deal is staying low, burying in fine sand, and picking off tiny bottom critters - super cool fish, but not really something you see in the aquarium trade.