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.
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
Gila Trout
The Gila trout is a rare golden-hued native trout restricted to a handful of remote headwater streams in New Mexico and Arizona, and remains one of North America's most range-limited trout species.
freshwater
Greater Pipefish
One of Europe's largest pipefish, the Greater Pipefish is a long, tube-snouted relative of the seahorse found among seagrass and rocky shallows from Scandinavia to the Mediterranean.
saltwater
Flathead Catfish
A massive, flat-headed catfish with a mottled yellow-brown body and a protruding lower jaw, known for its solitary, ambush-predator lifestyle in large river systems.
freshwater
European Pilchard (Sardine)
A small, silvery schooling fish found along the eastern Atlantic coast and throughout the Mediterranean, forming vast shoals that graze on plankton near the surface of coastal waters.
pelagic
Diamond Watchman Goby
A pearly white sleeper goby with pale yellow stripes and sky-blue head markings that spends its day sifting mouthfuls of sand for hidden invertebrates near its burrow.
reef
Dwarf Seahorse
One of the smallest seahorse species in the world, standing barely a few centimeters tall and clinging to seagrass blades in shallow waters of the southeastern United States and Bahamas.
saltwater
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.
reefDragonfish
Dragonfish are elongated, predatory deep-sea fish with needle-sharp teeth and a long luminous chin barbel used to lure prey in the permanently dark mesopelagic zone.
deepsea
Common Pandora
The common pandora is a slender pink sparid of the Mediterranean and eastern Atlantic, typically found over sandy and muddy bottoms where it feeds on small invertebrates.
saltwater
Common Carp
A large, hardy, bottom-feeding fish native to Eurasia and now found worldwide, recognizable by its stout body, barbels, and long dorsal fin, and the wild ancestor of ornamental koi.
freshwater
Brill
Brill is a left-eyed flatfish closely related to turbot, distinguished by its more elongated oval body, smooth scaled skin, and mottled brownish camouflage pattern.
saltwater
Black Sea Bass
A stocky, dark-bodied grouper relative common on rocky reefs and wrecks along the temperate western Atlantic coast, easily recognized by its high arched back and blunt head.
reef
Blonde Naso Tang
A striking unicornfish with a gray body, black-and-yellow facial markings, and a bright yellow blaze along the back, best known in the aquarium trade as the Indian Ocean's 'blonde' color form.
reef
Blue Runner
A slender, greenish-blue jack common along the western Atlantic coast, often called the hardtail and known for its schooling habits and role as forage for larger predators.
pelagicAtlantic Herring
A slender, silvery schooling fish that forms some of the largest shoals in the North Atlantic, feeding on plankton and serving as a key forage species for larger fish, seabirds, and marine mammals.
pelagic
Arctic Grayling
The Arctic grayling is a cold-water salmonid recognized by its tall, colorfully spotted dorsal fin, inhabiting clean rivers and lakes across northern North America and Siberia.
freshwater
Australian Rainbowfish
A widespread, variably colored rainbowfish found across tropical Australian and southern New Guinea waterways, ranging from olive-silver to vivid blue and yellow forms.
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
Aiptasia-eating Filefish
A small, drab Indo-Pacific filefish prized in reef aquariums for its habit of eating Aiptasia glass anemones, blending into seagrass and algae with mottled camouflage.
reef
Alligator Pipefish
The alligator pipefish is a robust, seagrass-dwelling pipefish with a thick, ridged body and a short, somewhat prehensile tail tip, giving it a stouter, more alligator-like profile than typical slender pipefish.
saltwater
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