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.
Salmon Shark
A powerful, warm-bodied mackerel shark closely related to the Porbeagle, built for speed in the cold North Pacific and named for its preference for salmon.
pelagic
Arctic Char
A cold-adapted char of circumpolar northern waters, showing extremely variable coloration and body form across isolated lake and anadromous populations.
freshwater
White Cloud Mountain Minnow
A hardy, cold-tolerant minnow with a metallic green-gold stripe and red-tinted fins, native to cool mountain streams in southern China.
freshwater
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
Dojo Loach
An elongated, whiskered East Asian loach, sold in the aquarium and pond trade under the Japanese name 'dojo,' known for burrowing in soft mud and tolerating cold water.
freshwater
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.
saltwaterSlickhead
A dark, soft-bodied deep-sea fish named for its smooth, scaleless head, drifting slowly along cold continental slopes far beyond the reach of sunlight.
deepsea
Rex Sole
A slender, deep-dwelling northeastern Pacific flatfish notable for unusually long pectoral fins and plain light brown coloration on cold continental shelf and slope bottoms.
deepsea
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
Cutthroat Trout
A native western North American trout named for the distinctive red-orange slash marks under its jaw, found in an array of subspecies across cold streams and mountain lakes.
freshwaterWhitefish
Lake whitefish are silvery, streamlined members of the salmon family that inhabit cold, deep lakes across North America, feeding along the bottom for insect larvae and small invertebrates.
freshwater
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
Cisco
Cisco, also known as lake herring, are slender silvery relatives of whitefish that form large open-water schools in the cold lakes of the northern United States and Canada, feeding mainly on plankton.
freshwater
Mottled Sculpin
A small, mottled brown freshwater sculpin found in clear, cold streams and lakes across North America, identified by its large head, wide pectoral fins, and lack of scales.
freshwater
Brook Trout
A colorful char native to cold, clear streams of eastern North America, marked by worm-like back markings and red spots haloed in blue along its sides. It is highly sensitive to water quality and temperature.
freshwater
Lake Trout
A large, deep-lake char native to cold northern North American waters, marked by pale spots on a dark greenish-gray body and a deeply forked tail. It typically inhabits the coldest, deepest zones of large lakes.
freshwater