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.
Chain Pickerel
A slender, elongated ambush predator with a distinctive dark chain-like pattern over green sides, common in weedy lakes and sluggish rivers of the eastern United States.
freshwaterBlue Gularis
One of the largest African killifish, males display an elongated lyre-shaped tail and vivid blue-green body with red barring, native to Nigerian and Cameroonian wetlands.
freshwater
Spangled Emperor
The spangled emperor is a large, pale grey-green emperor fish of the Indo-Pacific, marked by fine blue spangles on its scales and a strong, crushing jaw for cracking shellfish.
reef
Queen Angelfish
The Queen Angelfish is a large, vividly colored Caribbean reef fish with a blue-green body, yellow-rimmed scales, and a distinctive blue-ringed crown spot on its forehead.
reef
Rainbow Goby
A tiny, iridescent freshwater goby whose males display shimmering blue-green and orange coloration, found clinging to rocks in fast mountain streams across the Indo-Pacific.
freshwater
Grass Rockfish
A stocky, olive-green rockfish adapted to very shallow rocky habitats and tide pools, among the most tolerant rockfish species of low-oxygen, wave-exposed environments.
saltwater
Ember Parrotfish
The vivid orange-red juvenile color phase of the Redlip Parrotfish, prized in the aquarium trade for its fiery hue before it transforms into a much larger blue-green adult.
reef
Rock Wrasse
A common temperate wrasse of California and Baja kelp forests, recognized by its elongated olive-green body, salmon-pink belly, and a dark saddle-like blotch near the tail.
saltwater
Largemouth Bass
A robust, olive-green freshwater fish with a distinctive dark lateral stripe and a very large mouth, one of North America's most popular sport fish now established worldwide.
freshwater
Bristol Bay Sockeye
Bristol Bay sockeye are the world's largest wild sockeye salmon run, turning brilliant red with olive-green heads as they surge from the Bering Sea into Alaska's rivers to spawn.
freshwater
Moonlight Gourami
A sleek, silvery-green Mekong basin gourami with an iridescent sheen and vivid orange-red pelvic fin filaments, notably lacking the dark body spots seen in many related species.
freshwater
Croaking Gourami
A small Southeast Asian gourami capable of producing an audible croaking sound using modified pectoral fin muscles, marked with iridescent blue-green stripes and spots along a brownish body.
freshwater
Koran Angelfish
A large Indo-Pacific angelfish whose adults show a blue-green body scattered with pearly blue spots and lines, while striking juveniles display concentric blue and white circular bands.
reef
Bay Pipefish
The bay pipefish is a long, slender pipefish common in eelgrass beds and estuaries along the Pacific coast of North America, closely matching the green-brown color and shape of the eelgrass blades it hides among.
brackish
Smallmouth Bass
A bronze-green freshwater bass native to eastern North America, prized as a popular sport fish and recognized by its vertical dark bars and reddish eyes. It favors clear, rocky rivers, streams, and lakes.
freshwater
Bluehead Wrasse
A small, abundant Caribbean reef fish famous for changing color and sex as it matures, with terminal males developing a striking blue head and green body. It is one of the most numerous fish on western Atlantic reefs.
reef
Figure-Eight Puffer
A small brackish-water pufferfish named for the bold black figure-eight-shaped markings across its yellow-green back. Like other puffers, it can inflate its body with water as a defense against predators.
brackish
Streaked Spinefoot
A large silvery-gray rabbitfish marked with fine dark streaks and scattered pale spots, commonly found in estuaries, mangroves, and coastal reefs across the Indo-Pacific.
brackish
Scaled Sardine
A small, deep-bodied silvery fish that forms dense inshore schools along the Western Atlantic coast, easily confused with other small herring-like species.
saltwater
Ling Cod
A large, elongated predator of the North Pacific coast known for its mottled camouflage and cavernous, tooth-filled mouth. Despite the name, it is not a true cod but a member of the greenling family.
saltwater
Semicircle Angelfish
A large Indo-Pacific angelfish; adults are greenish-brown with blue-speckled fins and blue face lines.
reef
Weakfish
The Weakfish is an iridescent greenish-bronze sciaenid with diagonal spotted markings, found in mid-Atlantic estuaries and coastal waters of the U.S.
brackish
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.
pelagic
Twinspot Wrasse
A large Indo-Pacific wrasse; juveniles are white with two red-and-black spots, while old males become bulky and greenish with a forehead hump.
reef