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.
Flowery Flounder
An Indo-Pacific reef-associated flatfish densely covered in small blue rings and spots, giving a flower-like pattern, with both eyes on its upper left side.
reef
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
Great Sculpin
One of the largest sculpin species, with a heavily armored, spiny head and mottled brown body, found along rocky and muddy bottoms of the cold North Pacific.
saltwater
Green Neon Tetra
A Rio Negro blackwater characin closely related to the Neon Tetra, identified by its shimmering blue-green stripe and limited rear-body red coloration.
freshwater
Golden Wonder Killifish
A golden-orange color form of the striped panchax, this hardy topminnow patrols the water's surface hunting insects and small fish in South Asian wetlands.
freshwater
Greater Amberjack
A large, torpedo-shaped jack with a bronze-amber stripe running through the eye, commonly found around offshore reefs and wrecks worldwide.
reef
European Flounder
The European flounder is a right-eyed flatfish notable for its unusual tolerance of low salinity, regularly venturing far up rivers and estuaries.
brackish
European Grayling
The European grayling is a slender salmonid famous for its tall, sail-like, iridescent dorsal fin, found in cold, clear rivers and lakes across much of Europe.
freshwater
Ctenopoma (African Bushfish)
A stealthy, mottled labyrinth fish from West and Central Africa that ambushes small prey from cover and can gulp air to survive in oxygen-poor swamps.
freshwater
Crevalle Jack
A powerfully built, silvery jack with a steep forehead and a black spot on its gill cover, common along coastal and estuarine waters of the Atlantic.
pelagic
Copper Rockfish
A coppery-brown rockfish with a pale pink-white band along the back half of its body, commonly found near rocky structure and eelgrass beds close to shore.
saltwater
Combtail Gourami
A robust Sri Lankan gourami named for the comb-like fringe along its dorsal, anal, and tail fins, more aggressive and predatory than most smaller gourami relatives.
freshwater
Butterfly Ray
A ray with an exceptionally wide, flattened disc and short tail, resembling a butterfly in outline as it glides low over sandy coastal seabeds.
cartilaginous
Bumblebee Goby
The Bumblebee Goby is a tiny, boldly banded fish resembling its namesake insect, found in brackish mangrove and estuarine waters of Southeast Asia.
brackish
Buenos Aires Tetra
A hardy, cold-tolerant characin from the Parana-La Plata basin, prized in aquariums for its active schooling behavior and subtropical resilience.
freshwater
Bull Rout
Known as the shorthorn sculpin elsewhere, the Bull Rout is a camouflaged, spiny-headed fish common in cold North Atlantic tide pools and rocky shores.
saltwater
Comet Grouper
A pale grayish-brown Indo-Pacific grouper marked with elongated, comet-shaped pale streaks and spots, along with faint dark bands radiating from the eye.
reef
Bluespine Unicornfish
A large Indo-Pacific tang with a bony forehead horn and paired fixed blue-white spines at the tail base, browsing brown macroalgae on coral reefs and reef flats.
reef
Blue-spotted Stingray
A small, brilliantly patterned stingray common on Indo-Pacific coral reefs, instantly recognizable by its electric-blue spots and blue-striped tail.
reef
Chum Salmon
A large, widely distributed Pacific salmon known for the bold calico-patterned stripes and blotches that spawning adults develop along their flanks.
freshwater
Bastard Halibut
An alternate name for the olive flounder, a large East Asian coastal flatfish with a muscular olive-brown mottled body, big toothy mouth, and left-sided eyes.
saltwater
Blackfin Clownfish
An orange anemonefish with a single white head bar and distinctive black-edged pelvic and anal fins, endemic to reefs around the Maldives and Sri Lanka.
reef
Bluegill
A common North American sunfish recognized by its deep, rounded body and the dark blotch on its gill cover, widely found in lakes and ponds and popular with anglers.
freshwater
Bonito
A fast, streamlined relative of the tunas and mackerels, marked by bold dark diagonal stripes across its upper back, found in schools across temperate and warm seas.
pelagic