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
Barbed pipefish
Urocampus nanus
Urocampus nanus (barbed pipefish) occurs in protected inshore and estuarine habitats among seagrass (Zostera) in the Northwest Pacific (southern Japan and adjacent coasts). Like other syngnathids, males brood eggs in a pouch under the tail and produce fully formed young.
Barbedwire-tailed skate
Notoraja martinezi
Notoraja martinezi is a deepwater skate from the eastern Pacific (Costa Rica down to Ecuador) that lives way down on soft bottoms. The tail is the giveaway - it is lined with strong, hooked thorns that really do look like barbed wire. This is absolutely not an aquarium fish; it is a cold, high-pressure deep-sea animal with basically no practical home care info because it is not kept in the hobby.
Barred-chin blenny
Rhabdoblennius nitidus
A small intertidal combtooth blenny from the Western Pacific, usually found in surge channels and tide pools exposed to heavy surf. Males court females to spawn in crevices and then guard and fan the adhesive eggs until hatching. It is uncommon in the trade but adapts well to reef-like aquaria with ample rock holes, good flow, and stable marine chemistry.
Barred mudskipper
Periophthalmus argentilineatus
This is one of those classic "walks around like it owns the place" mudskippers-big goofy eyes, climbs, hops, and spends a ton of time out on the mud when it's humid. In the wild it lives on intertidal mangrove/nipa mudflats and even shuttles between little pools and open air, hunting worms, insects, and small crustaceans. It's super fun to watch, but it really wants a brackish paludarium setup (not a normal aquarium).
Barred topminnow
Quintana atrizona
This is a tiny Cuban livebearer that likes to lurk in thick plants and do that classic livebearer "hover and peck" routine all day. The cool part is the subtle black barring and how the fish kind of vanishes into floating plants, then pops right back out when food hits the water.
Barrens topminnow
Fundulus julisia
Fundulus julisia is a rare Tennessee Barrens Plateau topminnow that lives near the surface in springs and spring-fed creeks, often around aquatic vegetation, feeding largely on small aquatic insects. It is federally listed as Endangered (U.S., 2019) and is the focus of captive propagation and reintroduction efforts.
Barrier reef anemonefish
Amphiprion akindynos
This is one of the cooler Great Barrier Reef clowns - orange-brown with two crisp white bars edged in black and that pale tail. Give it a spot to claim (ideally with an anemone or at least a comfy coral substitute) and it will settle in hard, pair up, and act like the little boss of its corner.
Beach silverside
Atherinella blackburni
This is a little coastal silverside that cruises the shallows in loose groups and flashes like a tiny chrome dart when the light hits it right. In the wild it hangs around beaches, estuaries, and lagoons, picking at small drifting foods in the surf zone. It is cool, but its real "gotcha" is that it is an open-water, salt-tolerant schooling fish that does best in bigger, well-oxygenated setups rather than a typical planted community tank.
Bearded puffer
Pao barbatus
This is a chunky little Mekong River puffer that gets a cool "bearded" look from the dark spotting around the lips. It is one of those puffers that acts like a tiny water-dog - always watching you, always investigating, and always ready to crunch something shelled. Not a great community fish though, because puffers are basically curious biters with a beak.
Beni whiptail catfish
Rineloricaria beni
Skinny little whiptail from Bolivia with a super long tail and camo pattern that blends right into sand and leaf litter. They are gentle bottom grazers that do great in groups, and the males are awesome dads, fanning a clutch of eggs in a tight cave until they hatch.
Ben-Tuvia's goby
Didogobius bentuvii
This is a tiny little Mediterranean goby from the Israeli coast that lives down on the bottom over muddy-sand, and it is likely a burrower. In other words, it is a blink-and-you-miss-it kind of fish - super small, demersal, and more about sneaky bottom-dweller vibes than flashy swimming.
Betta
Betta splendens
Betta fish, also known as Siamese fighting fish, are popular for their striking colors and flowing fins. They are known for their territorial nature, especially males, which can display aggressive behavior towards each other.