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.
Dwarf Gourami
A small, colorful labyrinth fish from South Asia, with males displaying vivid diagonal red and blue stripes, popular in the freshwater aquarium trade.
freshwater
Dwarf Livebearer
One of the smallest fish species in the world, this tiny freshwater livebearer from the southeastern United States is prized for its miniature size and easy breeding.
freshwater
California Grunion
A slender coastal fish famous for coming fully ashore on sandy California beaches during nighttime spawning runs timed to spring high tides.
saltwater
Blue Reef Chromis
A slender, brilliant blue schooling fish commonly seen hovering in large numbers above coral reef outcrops throughout the Caribbean and western Atlantic.
reef
Blue Tang
A vivid royal-blue reef fish with a black palette-shaped marking and a bright yellow tail, popularized worldwide after appearing in animated film.
reef
American Paddlefish
The American paddlefish is a primitive filter-feeding fish famous for its long, paddle-shaped snout, native to the Mississippi River basin of North America.
freshwater
Zebrafish
A small, striped South Asian minnow renowned worldwide as a key model organism for genetics and developmental biology research, alongside its popularity as an aquarium fish.
freshwater
Spot Croaker
Spot is a small, deep-bodied estuarine fish easily identified by a single dark shoulder spot and faint oblique bars along its upper body.
brackish
River Lamprey
The river lamprey, also known as the lampern, is a small anadromous European lamprey that feeds parasitically on fish in coastal and estuarine waters before migrating into rivers to spawn.
brackish
Queen Triggerfish
The Queen Triggerfish is a strikingly colorful Atlantic reef fish, marked by blue facial lines, a yellow-tinged tail, and elongated dorsal and tail fin filaments.
reef
Pacific Halibut
The Pacific halibut is a massive right-eyed flatfish of the cold North Pacific, closely related to the Atlantic halibut and among the largest bony fish in its range.
saltwater
Mono Argentus
A flat, disc-shaped, mirror-silver fish with tall yellow-tinged fins, commonly seen schooling in brackish estuaries and harbors across the Indo-Pacific.
brackish
Marbled Hatchetfish
A tiny South American fish with a deep, keeled belly and enlarged pectoral fins that let it skim and glide just above the water surface to escape predators.
freshwater
Common Bream
A deep-bodied, bronze-flanked European fish that forms large shoals in slow rivers and lakes, feeding on the bottom with a distinctive protrusible, tube-like mouth.
freshwaterBeluga Sturgeon
One of the largest anadromous fish in the world, native to the Caspian and Black Sea basins. It migrates into major rivers like the Volga and Danube to spawn and is critically endangered.
brackish
Angel Shark
A flattened, ray-like shark that buries itself in sand to ambush passing fish, once widespread but now one of the most critically threatened sharks in Europe.
saltwater
White Sturgeon
The white sturgeon is the largest freshwater fish in North America, an armored, long-snouted giant found in Pacific coast rivers from California to British Columbia.
freshwater
Wolf Herring
A slender, silvery predator with a fanged, upturned jaw, the wolf herring hunts small fish in Indo-Pacific coastal waters despite belonging to the herring order.
saltwaterTiger Muskie
A hybrid of northern pike and muskellunge, this elongated apex predator sports bold dark tiger stripes and is prized as one of freshwater's most aggressive game fish.
freshwater
Sterlet
The sterlet is the smallest widespread sturgeon species, a slender freshwater fish of Ponto-Caspian rivers known for its long, thin, upturned snout with fringed barbels.
freshwater
Stoplight Parrotfish
A common Caribbean reef fish whose terminal-phase males show brilliant green bodies with a distinctive yellow spot at the tail base resembling a stoplight.
reef
Shortnose Sturgeon
The shortnose sturgeon is a small, endangered anadromous fish of eastern North America, distinguished from its larger Atlantic sturgeon relative by a shorter, blunter snout.
brackish
Roosterfish
An unmistakable eastern Pacific game fish named for the tall comb-like spines of its dorsal fin, which it raises above the water while hunting.
saltwater
Orange-lined Triggerfish
The Orange-lined Triggerfish is a dark green triggerfish covered in bold curving orange stripes, one of the most vividly patterned fish on Indo-Pacific reefs.
reef