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.
Flounder
A flatfish with both eyes on its upper side that lies camouflaged against sandy or muddy bottoms, ambushing small fish and invertebrates that pass overhead.
saltwater
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
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.
saltwater
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
Clown Knifefish
A knife-shaped Southeast Asian fish with a distinctive row of large black eyespots along its rear body and a long, continuous ventral fin.
freshwater
Blacktip Shark
A fast, energetic coastal shark named for the black tips on most of its fins, often seen leaping and spinning while chasing schooling fish.
saltwater
Arapaima
One of the largest freshwater fish in the world, this massive Amazonian species has thick armor-like scales and must surface periodically to breathe air.
freshwater
Vermilion Rockfish
A vivid orange-red rockfish of Pacific coast reefs, often called 'red snapper' informally by anglers despite being unrelated to true snappers.
saltwater
Spotted Eagle Ray
A striking, diamond-shaped ray covered in bright white spots on a dark back, known for graceful swimming and spectacular leaps above coral reefs.
reef
Neon Damselfish
A small, brilliant iridescent blue damselfish with a touch of yellow on the tail, commonly seen in loose groups over rubble and coral on Indo-Pacific reefs.
reefGreen Chromis
The Green Chromis is a small, shimmering blue-green damselfish that forms large schools hovering above branching coral heads on Indo-Pacific reefs.
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
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
Bar Jack
A sleek, blue-green jack with a dark stripe along its back and a black-and-white striped tail, common on Caribbean and western Atlantic reefs.
reef
Barbour's Seahorse
A small, spiny-crowned seahorse native to the coral reefs and seagrass beds of the western Pacific, distinguished by fine dark banding along its snout.
reef
Whale Shark
The largest fish in the world, a gentle filter-feeding shark covered in a distinctive checkerboard pattern of pale spots and stripes, found in warm seas worldwide.
cartilaginous
Silver Aba
A tail-less, eel-shaped African fish that swims by rippling a long dorsal fin and generates a weak electric field to sense its surroundings.
freshwater
Sea Hagfish
The sea hagfish is a primitive, eel-shaped jawless fish that scavenges on the deep, cold seafloor of the North Atlantic and produces enormous amounts of defensive slime.
deepsea
Reedfish
A snake-bodied African fish with a lung-like breathing organ, related to bichirs, prized for its unusual elongated form and air-breathing ability.
freshwater
Purple Spotted Gudgeon
A stocky, olive-brown Australian freshwater fish covered in scattered iridescent purple-blue spots, favoring weedy, slow-moving streams and lagoons.
freshwater
Pacific Saury
A slender, silvery, beaked schooling fish of the temperate North Pacific, closely related to needlefish, marked by a row of small finlets near its tail.
pelagic
Pacific Lamprey
The Pacific lamprey is a jawless, anadromous fish with a toothed sucking disc mouth, found along Pacific coastlines from Baja California to Japan and Alaska.
saltwater
Mekong Giant Catfish
One of the largest freshwater fish on Earth, this critically endangered giant inhabits the deep main channel of the Mekong River and undertakes long spawning migrations.
freshwater
Loach Goby
The Loach Goby is an elongated, flat-bodied fish that clings to rocks in fast-flowing Indo-Pacific streams, combining goby and loach-like features.
freshwater