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.
Creek Chub
A stout, adaptable minnow common in small North American creeks, the creek chub is a dominant predator in headwater streams, feeding on insects and small fish, and known for building spawning nest mounds.
freshwater
Chub
A robust, thick-shouldered cyprinid of European rivers, the chub is a wary predator-scavenger that lurks under banks and cover, feeding on anything from insects to small fish.
freshwater
Chub Mackerel
A widespread schooling mackerel found in temperate and subtropical seas worldwide, marked by irregular dark bars on its back and faint spots along its lower flanks.
pelagic
Mummichog
A stout, hardy killifish common in salt marshes and estuaries along the North American Atlantic coast, well known for its extreme tolerance of changing salinity and oxygen levels.
brackish
Chum Salmon
A large, widely distributed Pacific salmon known for the bold calico-patterned stripes and blotches that spawning adults develop along their flanks.
freshwater
Pacific Mackerel
A schooling pelagic fish of the eastern Pacific with an iridescent blue-green back marked by irregular dark bars and scattered spots along its lower flanks.
pelagic
Sheepshead Minnow
A stocky, deep-bodied pupfish tolerant of extreme salinity swings, common in salt marshes and tidal creeks along the Atlantic and Gulf coasts of North America.
brackish
Green Spotted Puffer
A small, popular aquarium puffer with a bright green, black-spotted back and white belly, native to brackish estuaries and mangrove creeks across Southeast Asia.
brackish
Wrestling Halfbeak
Named for the ritualized jaw-locking contests between rival males, the wrestling halfbeak is a slender surface-dwelling fish from Southeast Asian creeks and mangrove-fringed brackish waters.
brackish
Diamond Killifish
A tiny, unusually deep-bodied killifish from Gulf Coast salt marshes, named for its compressed, diamond-shaped profile. It tolerates wide swings in salinity within tidal creeks and marsh pools.
brackish
Bay Anchovy
One of the most abundant fish in Atlantic and Gulf Coast estuaries, the tiny Bay Anchovy is a key forage species that tolerates a wide range of salinities from open bays to nearly fresh tidal creeks.
brackish
Dog Salmon Herring
Despite the name, this is the chum salmon, nicknamed 'dog salmon' for its prominent canine-like spawning teeth — a true Pacific salmon, not a herring.
saltwater