Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 665 species
Dwarf pleco
Parotocinclus cristatus
A tiny Parotocinclus from coastal streams around Ilheus, Bahia, it acts like a mini pleco that spends its day grazing biofilm on rocks, wood, and leaves. Keep a small group in clean, well-oxygenated water and you will see them constantly scooting and shimmying around while they pick at algae.
Dwarf pufferfish (Pea puffer)
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.
Eastern longfin goby
Favonigobius lentiginosus
This is a little sand-loving coastal goby that hangs around estuaries, mangroves, tidepools, and sandy flats, and it does that classic goby thing of perching and scooting along the bottom. Color-wise its pretty subtle but really neat up close - sandy brown with distinct bars and head striping - and it spends a lot of time hunting tiny crustaceans in the substrate.
Eastern mudminnow
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.
East Indian lipsucker
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.
East Indies siltgoby
Amblygobius cheraphilus
This is a tiny little sand-and-silt goby from the western Pacific that hangs around soft-bottom areas near reefs and spends its time picking/sifting for small critters. Its look is super clean and subtle - grayish with two reddish-brown stripes and a dark spot on the gill cover - and it is one of those fish that really wants a fine, mature substrate to graze on. Because it is not a standard-import aquarium fish, most of the hard care numbers you see for it are best treated as 'typical Amblygobius/sand-sifting goby' rather than species-proven.
East-Pacific ventbrotula
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.
Edward cichlid
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.
Eelpout
Oidiphorus brevis
This little eelpout hangs out way down in frigid water off Patagonia and the Falklands, so you are never going to see it in a home tank. It tops out around 11.5 cm and lives on the seafloor between about 135 and 900 m, picking at benthic critters. Cool fish, just more of a deep-sea curiosity than an aquarium candidate.
Elongate killifish
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.
Elongate shore-eel
Alabes elongata
Alabes elongata is a tiny, eel-shaped marine shore fish from Western Australia that lives right in the shallow reef and seagrass zone. It looks like a little slippery noodle with reduced fins, and it spends its time tucked into weed/reef structure rather than cruising the open water. This is the kind of oddball you appreciate for its weird body plan and secretive lifestyle, not because its going to be out front begging for food.
Ember tetra
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.