Fish Encyclopedia
Search and identify 1,000+ fish species — freshwater, saltwater, reef, and pelagic — with habitat, size, diet, behavior, and how to tell them apart.
Betta
A small, vividly colored Southeast Asian freshwater fish famed for its flowing fins and the intense territorial aggression of males toward rivals.
freshwater
Siamese Algae Eater
A slim, torpedo-shaped Southeast Asian minnow relative well known among aquarium keepers for actively grazing on a wide range of algae types.
freshwater
Sabertooth Fish
A slender deep-sea predator with oversized fang-like teeth and unusual tubular, upward-angled eyes that help it spot the silhouettes of prey against faint downwelling light.
deepsea
Paradise Fish
A hardy East Asian labyrinth fish with vivid blue-and-red banded flanks and flowing fins, historically one of the first ornamental fish kept in Western aquariums.
freshwater
Tripod Fish
An abyssal fish that props itself above the seafloor on three elongated fin rays, forming a tripod, and waits motionless facing into the current to ambush tiny drifting prey.
deepsea
Jackknife-fish
A boldly black-and-white striped reef drum with a dramatic, curved dorsal fin that resembles the blade of an open jackknife.
reef
Football Fish
A round, warty deep-sea anglerfish whose much larger females dangle a bioluminescent lure from a spine above the mouth to draw prey through the permanent darkness of the deep ocean.
deepsea
Bumblebee Fish
A tiny, boldly banded goby popular in brackish aquariums, named for its wasp-like black-and-yellow stripes.
brackish
Four-Eyed Fish
A surface-dwelling brackish-water fish famous for eyes split into upper and lower halves, allowing it to see simultaneously above and below the waterline.
brackish
African Tiger Fish
A ferocious, fast-swimming predator of southern and eastern African rivers, armed with prominent interlocking teeth and known for spectacular aerial strikes on prey.
freshwater
Leopard Bush Fish
A round-bodied Congo basin ambush predator patterned with dark leopard-like spots, prized in aquariums for its striking camouflage and air-breathing labyrinth organ.
freshwaterBigfin Squid Fish
Despite the common name, this is not a true fish but a rarely filmed deep-sea cephalopod, famous for extraordinarily long elbowed arms trailing beneath a small gelatinous body.
deepsea
Wrestling Halfbeak
Named for the ritualized jaw-locking contests between rival males, the wrestling halfbeak is a slender surface-dwelling fish from Southeast Asian creeks and mangrove-fringed brackish waters.
brackish
Snakeskin Gourami
A large, elongated Southeast Asian gourami named for the diagonal, snakeskin-like striping pattern across its olive-brown flanks, widely distributed through floodplain and canal habitats.
freshwater
Black Swallower
A small deep-sea fish renowned for an extraordinarily distensible stomach that lets it engulf prey several times its own body length and mass in a single strike.
deepsea
Penguin Tetra
An Amazonian characin recognized by its bold black tail stripe and unusual head-up swimming posture resembling a penguin's stance.
freshwater
Porkfish
A bright yellow Caribbean grunt marked by two bold black diagonal stripes across the head, forming large schools that shelter near reef structure by day.
reef
Neon Tetra
A tiny schooling characin from Amazonian blackwater streams, instantly recognized by its glowing blue-green stripe and bright red lower body, one of the most popular aquarium fish ever kept.
freshwater
Flyingfish
The common name for fish of the family Exocoetidae, known for gliding above the ocean surface on enlarged, wing-like fins; the Flyingfish (*Exocoetus volitans*) represents this widespread tropical group.
pelagic
Cuckoo Wrasse
A vividly patterned wrasse of the Northeast Atlantic and Mediterranean, with males displaying bold blue and orange stripes and females a softer pink patterned with black-edged white spots.
reef
Fingerfish
Another common name for the disc-shaped Mono, called Fingerfish for its thin, laterally compressed body. It schools in Indo-Pacific estuaries and coastal waters, flashing bright silver as it moves.
brackish
European Sea Bass
The European sea bass is a sleek, silvery predator common along European and North African coasts, prized by anglers as a hard-fighting sport fish.
saltwaterSailfin Flyingfish
A small, two-winged flyingfish with a tall, sail-like dorsal fin and blunt snout, found gliding over warm coastal and offshore surface waters worldwide.
pelagic
Pipefish
A slender, elongated relative of the seahorse with a rigid, ring-plated body and tubular snout, commonly found camouflaged among seagrass and algae in coastal waters worldwide.
saltwater