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
Trichogaster lalius
Dwarf gouramis are those little jewel-box labyrinth fish that hang out near the surface, cruising through plants and popping up for air when they feel like it. Give them a calm, planted setup and they'll reward you with tons of personality-males especially will posture and show off, and they're classic bubble-nest builders when they're in the mood.
Carinotetraodon travancoricus
This is the famous pea puffer-tiny (around 3.5 cm max) but it acts like a full-size puffer, cruising around and hunting little critters with a ton of attitude. If you give it a heavily planted tank with lots of line-of-sight breaks, you'll get to watch really cool "stalking" behavior all day.
Andamia heteroptera
This is one of those wild intertidal blennies that clings to wave-battered rocks with a sucker-like lower lip and will even pop out onto damp rock when conditions let it. In the ocean its whole lifestyle is about hanging on in the splash zone, grazing and picking at tiny foods between surges, so it is a super cool fish but honestly not a typical "throw it in a reef tank" kind of species.
Ventichthys biospeedoi
This is a deep-sea cusk-eel that lives right around hydrothermal vents on the Southeast Pacific Rise - basically the fish equivalent of hanging out next to an underwater volcano. Its thick skin and other oddball body features are thought to be adaptations for that extreme vent neighborhood, and it seems to be a scavenger/predator on small stuff down on the bottom.
Umbra pygmaea
Eastern mudminnow (Umbra pygmaea) is a small freshwater umbrid native to eastern North America that inhabits slow, vegetated waters such as swamps, ponds, and ditches. It feeds mainly on insect larvae and small aquatic invertebrates and is noted for tolerance of low-oxygen wetland habitats.
Haplochromis pharyngalis
This is one of those Lake Edward haplochromines that has the typical sleek, fast "hap" shape and attitude. It is not something you see in the average fish store, but if you do find it, treat it like a medium-sized African cichlid that appreciates hard, alkaline water and some real swimming room.
Ituglanis eichorniarum
Ituglanis eichorniarum is a tiny, secretive trichomycterid (pencil catfish) from the Paraguay-Parana system, the kind of fish that spends its time nosing through plants and leaf litter instead of cruising the open water. The species name comes from Eichhornia (water hyacinth), which is a fun clue to the sort of weedy habitat it was found in.
Titanolebias elongatus
Titanolebias elongatus is a giant annual killifish from temporary waters in the Lower Parana-La Plata basin - it grows way bigger than most "typical" killies and has that chunky, predatory vibe. It is a bottom spawner with a long egg diapause (months), and its whole lifestyle is built around racing the dry season, which is just wild to watch and work with if you are into breeding projects.
Hyphessobrycon amandae
Ember tetras are tiny little orange "glow fish" tetras that look insanely good over a dark substrate with plants and a bit of leaf litter. They're happiest in a proper little gang, and when they settle in and feel safe the whole school starts moving like one warm, flickery cloud.
Nematobrycon palmeri
Emperor tetras are those classy little Colombian characins with the dark horizontal stripe and the males' awesome trident/lyretail look. Keep a decent-sized group and you'll see the males do their little posturing displays without really hurting each other, especially in a planted tank with some shade.
Poecilia wingei
Endlers are basically tiny little firecrackers-males stay small but flash a ton of neon color and never stop cruising the tank. They're super social and active, and if you keep males and females together you'll have babies before you've even finished tweaking the aquascape.
Osteochilus partilineatus
Osteochilus partilineatus is a tiny little bony-lipped barb from West Kalimantan (Borneo) that lives in deep, blackwater forest streams with flowing water. Its small adult size is the cool part here - it is one of those "wait, that is an Osteochilus?" species - but it is not really a standard aquarium fish, so most of its care is best approached like a sensitive blackwater river/stream cyprinid.