Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 528 species
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.
Brazilian codling
Urophycis brasiliensis
This is a demersal (bottom-loving) marine codling from the Southwest Atlantic that hangs around the continental shelf and cruises sandy/rocky bottoms looking for food. It is basically a cool, mottled little gadiform with that classic codling vibe - elongated body and a chin barbel - and it is mostly of interest as a food/fishery species rather than something you would ever see in home aquariums.
Brazilian sand stargazer
Platygillellus brasiliensis
Tiny marine sand-burrower that pops just its eyes and a little fan-like dorsal finlet above the substrate and ambushes food. Give it a fine to medium sand bed and expect lots of peek-a-boo behavior rather than open swimming. It can be picky at first, so target feeding small meaty foods helps a ton.
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.
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.
Bristletooth conger
Xenomystax congroides
This is a deepwater conger eel from the western Atlantic that cruises continental slopes hundreds of meters down. It gets big and prefers cool water, so it is more of a public-aquarium fish than a home tank fish. If you ever saw one up close, the long, slender build and toothy grin are pretty wild.
Broadbanded velvetchin
Hapalogenys analis
Stocky, banded reef-edge grunt with little chin barbels that it uses to feel around sandy bottoms. It hangs near the bottom in cool to warm-temperate seas and snaps up small crustaceans and fishes, so it is not reef-safe. Give it room and strong, clean flow and it settles in well.
Broadbarred firefish
Pterois antennata
This is the lionfish with the long "antennae" (those banded tentacles above the eyes) and the ragged, spotty fins that make it look extra dramatic under reef lighting. It'll spend the day tucked under ledges and then cruise out at dusk to ambush shrimp, crabs, and any small fish it can fit in its mouth-also worth remembering it's venomous, so you treat it with respect when you're in the tank.
Brownspotted stargazer
Uranoscopus fuscomaculatus
A deep demersal stargazer recorded at 366–389 m that lies buried in sand or mud to ambush prey. Distribution is Southwestern Pacific (Vanuatu and Fiji). Given its deep, cold habitat and specialized requirements, it is not a practical aquarium species.
Bullseye puffer
Sphoeroides annulatus
Big personality in a football-shaped body with pale rings along the back that make a bullseye pattern. This is a stout Eastern Pacific puffer that crunches snails and crabs with ease and needs true saltwater and lots of room. Super cool to watch, but it turns nippy with tankmates and grows into a serious, messy eater.