Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 654 species
Borneo sucker (Segama River gastromyzon)
Gastromyzon spectabilis
This is one of the true Borneo "suckers" from fast, rocky streams - the kind that park themselves on stones and graze biofilm like a little living coaster. FishBase notes its distinctive live coloration/patterning (the whole reason it got named spectabilis), and it stays small, so its whole vibe is more "stream tank grazer" than "loach that cruises around." If you give it clean, oxygen-rich water and lots of algae-covered rock, it will reward you with nonstop weird, cool hillstream behavior.
Boulenger's featherfin tetra
Bryconaethiops boulengeri
This is a big, super-active African tetra from the Congo basin that really wants open swimming room and a group of its own kind. It cruises the mid-to-upper water and will absolutely chase down insects at the surface, so a tight lid is smart if you keep it.
Bradbury's batfish
Coelophrys bradburyae
A tiny deep-sea batfish (family Ogcocephalidae) known from deep water off Japan; the original description was based on a single specimen collected at 557–595 m, and the species remains poorly known.
Brazilian batfish
Ogcocephalus vespertilio
Wild-looking bottom-walker that shuffles around on its fins and flicks a little fishing-rod lure to snag snacks. It gets dinner-plate big, so it needs a big footprint tank and gentle tankmates that will not nip or outcompete it. Super cool to watch once it learns hand-feeding.
Brazilian Chromis
Chromis jubauna
Picture a little reef surfer from Brazil with a dark chocolate body and a bright yellow tail and dorsal that really pop under lights. It hovers midwater picking plankton and looks coolest in a roomy setup with good flow, though like all chromis they can squabble if cramped. Hardy and easy to feed once settled.
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Brilliant rummy-nose tetra
Petitella bleheri (syn. Hemigrammus bleheri)
This is the rummy-nose with the really "full-face" red that runs back past the gill plate, plus that crisp black-and-white tail that flashes when the whole group turns together. When they're happy and the water's clean, they school tight and look like one living fish-when they're stressed, that red head fades fast, so they're basically your tank's mood ring.
Bristlemouth
Gonostoma denudatum
Gonostoma denudatum is a deep-sea bristlemouth that spends its life out in the dark, open ocean and does that classic daily up-and-down migration (deeper in the day, shallower at night). It has silvery flanks, a darker back, and light-producing photophores that start showing up as it grows - super cool biology, but not something you would ever realistically keep in a home aquarium.
Bristlenose Pleco (Common Bristlenose)
Ancistrus cirrhosus
The Bristlenose Pleco is a small catfish with a sucker mouth, armored body, and distinctive bristles on its face, especially in males. It is primarily nocturnal and spends much of its time grazing on biofilm and algae from surfaces, making it a popular, hardy "algae-eater" in community aquariums.
Bristletail Filefish (Aiptasia-Eating Filefish)
Acreichthys tomentosus
This little weirdo is one of my favorites because it's got that goofy filefish "face," a knack for wedging itself into rockwork, and a ton of personality once it settles in. People love them for the chance they'll snack on nuisance Aiptasia, but even when they're not on pest patrol they're just fun to watch cruise around and pick at stuff all day.
Bronze Corydoras
Corydoras aeneus
The Bronze Corydoras is a charming and highly popular freshwater fish known for its peaceful nature and striking bronze coloration. It has a stout body with barbels around its mouth, allowing it to forage effectively on the substrate. Often seen in schools, this species is well-loved for its social behavior and bottom-dwelling habits.
Brown Fork-Tail Loach
Vaillantella cinnamomea
Vaillantella cinnamomea is a slim little Borneo loach with that cool forked tail and a subtle cinnamon-brown body with a dark eye stripe. It spends most of its time hugging the bottom and weaving through leaf litter and roots, then suddenly darts like a tiny torpedo when food hits the sand. Keep the tank covered tight - these forktails are famous for surprise launches.
Buffon's river-garfish
Zenarchopterus buffonis
This sleek, surface-dwelling halfbeak has a distinct dark stripe along the snout and is typically found at the surface in coastal waters, estuaries, and rivers where it feeds on terrestrial insects. In aquaria it does best with floating/surface foods and a secure cover, and it requires brackish (or marine) conditions long-term. Reproduction is internally fertilized; FishBase lists the species as ovoviviparous.