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.
Clown Killifish
A tiny, torpedo-shaped killifish from West African rainforest streams, patterned with alternating black and cream bands and a fiery red-and-blue tail resembling a tiny rocket.
freshwater
Cardinal Tetra
A tiny, jewel-toned freshwater fish with an iridescent blue stripe running the length of its body above a vivid red stripe below, native to the blackwater tributaries of the Amazon.
freshwater
Flame Hawkfish
A brilliant red-orange reef fish that perches motionless atop branching coral, darting out to ambush small prey.
reef
Tiger Rockfish
A brightly patterned rockfish with bold dark vertical bars across a pink to reddish body, resembling its namesake big cat and typically found in deeper rocky reef crevices.
saltwater
Sohal Tang
A powerfully built surgeonfish endemic to the Red Sea and nearby Arabian waters, marked by bold blue and black striping and known for fiercely defending shallow reef flats.
reef
Grey Snapper
The grey snapper, also called mangrove snapper, is an adaptable western Atlantic species with a dark reddish-grey body and a dark streak through the eye, ranging from mangrove estuaries to coral reefs.
reef
Graysby
The graysby is a small, reddish-brown reef grouper of the tropical western Atlantic, densely covered in pale spots and marked with a few larger dark blotches along its back.
reef
Green Swordtail
The naturally colored, wild-type form of the swordtail, the green swordtail displays an olive-green body with a red-brown stripe and the species' signature elongated tail extension in males.
freshwater
Crimson-spotted Rainbowfish
A small, deep-bodied rainbowfish native to coastal rivers of eastern Australia, recognized by its iridescent blue-green flanks marked with rows of crimson-red spots.
freshwater
Ember Tetra
A tiny, glowing orange-red tetra that shoals in large numbers and is among the smallest characins kept in freshwater aquaria.
freshwater
Yellowtail Wrasse
A striking Indo-Pacific wrasse whose bright red spotted juveniles transform into green-blue adults with a yellow tail.
reef
Von Rio Tetra
A small, fiery-red tetra native to coastal rivers near Rio de Janeiro, notable for two dark shoulder spots and deep red hindquarters.
freshwater
Bleeding Heart Tetra
A deep-bodied upper Amazon characin marked by a small red 'bleeding heart' spot and, in males, a dramatic elongated dorsal fin.
freshwater
American Plaice
A right-eyed flounder of the cold North Atlantic, identifiable by its rough scales, curved lateral line, and reddish-brown upper body.
saltwater
Steel-blue Killifish
A small, brightly colored West African killifish with a metallic blue body, red spotting, and an elongated lyre-shaped tail. It inhabits swamps and forest streams in Nigeria and Cameroon.
freshwater
Ruby Seadragon
The ruby seadragon is a rare, deep-dwelling relative of the leafy and weedy seadragons discovered in 2015 off Western Australia. Unlike its relatives, it lacks leaf-like appendages and has a distinctive reddish body.
reef
Pumpkinseed
A small, brilliantly colored sunfish with an orange-spotted body, blue-green facial streaks, and a distinctive red spot on the black ear flap, common in weedy ponds and lakes of eastern North America.
freshwater
Murray River Rainbowfish
A slender, schooling rainbowfish native to Australia's Murray-Darling river system, displaying subtle pink-red stripes and yellow-tinted fins along its silvery-blue body.
freshwater
Kokanee Salmon
Kokanee are a landlocked, non-migratory form of sockeye salmon that spend their entire life in freshwater lakes, turning bright red during their autumn spawning run into tributary streams.
freshwater
Koi
Ornamental color varieties of the Amur carp, selectively bred in Japan for centuries into hundreds of red, white, black, and gold patterns kept in decorative ponds worldwide.
freshwater
Coney
The coney is a small, color-variable reef grouper of the tropical western Atlantic, occurring in reddish-brown, bicolor, or bright golden-yellow forms, always marked with fine blue spotting.
reef
California Sheephead
A large sequential-hermaphrodite wrasse of California and Baja kelp forests, with males showing a striking black-and-red pattern and prominent canine teeth used to crush hard-shelled prey.
reef
White Hake
White hake is a large, elongated cod relative of the western North Atlantic shelf and slope, larger and grayer than red hake, with long pelvic fin filaments.
saltwater
Flagtail Prochilodus
The Flagtail Prochilodus is a schooling South American river fish named for its bold red-and-black striped tail fin, which resembles a flag.
freshwater