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.
Red-eye Tetra
A hardy, wide-ranging South American characin identified by its striking red iris band and bold black-and-white marked tail base.
freshwater
Red Phantom Tetra
A blackwater Orinoco characin with a rosy translucent body and bold black shoulder mark, known for its tall, flag-like dorsal fin in males.
freshwater
Rummynose Tetra
A slender silvery tetra known for its bright red-orange snout and a bold black-and-white striped tail, prized for tight, synchronized shoaling.
freshwater
Flame Tetra
A Rio de Janeiro coastal stream characin with a graduated flame-like color pattern from silver at the head to red-orange at the tail.
freshwater
Serpae Tetra
A vividly red-bodied tetra with a bold black shoulder patch, known for its assertive, nippy temperament within shoaling groups.
freshwater
Glowlight Tetra
A slender, translucent tetra marked by a bright iridescent orange-red stripe running the length of its body, giving it a luminous glow effect.
freshwater
Cardinal Tetra
A tiny, jewel-toned freshwater fish with an iridescent blue stripe running the length of its body above a vivid red stripe below, native to the blackwater tributaries of the Amazon.
freshwater
Neon Tetra
A tiny schooling characin from Amazonian blackwater streams, instantly recognized by its glowing blue-green stripe and bright red lower body, one of the most popular aquarium fish ever kept.
freshwater
Ember Tetra
A tiny, glowing orange-red tetra that shoals in large numbers and is among the smallest characins kept in freshwater aquaria.
freshwater
Bloodfin Tetra
A slim silvery tetra with bright red fins, prized as a hardy, active schooling fish that tolerates cooler water than most tropicals.
freshwater
Colombian Tetra
A large, vividly rose-red characin native to northern Colombian rivers, notable for its bold coloration and confident schooling behavior.
freshwater
Rummy-nose Tetra
A small schooling Amazonian tetra known for its bright red-orange snout and a bold black-and-white striped tail fin, prized in aquariums for its striking coloration and tight shoaling behavior.
freshwater
Green Neon Tetra
A Rio Negro blackwater characin closely related to the Neon Tetra, identified by its shimmering blue-green stripe and limited rear-body red coloration.
freshwater
Von Rio Tetra
A small, fiery-red tetra native to coastal rivers near Rio de Janeiro, notable for two dark shoulder spots and deep red hindquarters.
freshwater
Bleeding Heart Tetra
A deep-bodied upper Amazon characin marked by a small red 'bleeding heart' spot and, in males, a dramatic elongated dorsal fin.
freshwater
Head and Tail Light Tetra
An Amazon and Guiana river characin named for its glowing metallic eye and tail-base spots, resembling a pair of tiny headlights.
freshwater
Round Herring
Named for its unusually rounded, cylindrical body, the Round Herring is a schooling coastal pelagic fish found in temperate and subtropical seas worldwide, serving as an important forage species for larger predators.
pelagic
Mexican Tetra
A resilient silvery tetra native to Texas and Mexico, renowned for cave populations that lost their eyes and pigment through evolution in total darkness.
freshwater
Blind Cave Tetra
A ghostly pink, eyeless cavefish descended from surface-dwelling Mexican tetras, adapted over millennia to life in total darkness within Mexican limestone caves.
freshwater
Redeye Bass
A small, stream-dwelling black bass named for its bright red eyes, native to rocky, fast-flowing rivers of the southeastern Appalachian foothills.
freshwater
Rock Bass
A robust, bronze-colored sunfish relative with striking red eyes, often found around rocky cover in clear streams and lakes of eastern and central North America.
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
Red Drum
The Red Drum is a coppery-bronze coastal fish of the western Atlantic and Gulf of Mexico, best known for the dark eyespot near its tail.
brackish
Redfish
A coppery-bronze estuarine predator famous for the large black eyespot near its tail, the Redfish is a mainstay of shallow coastal flats along the Gulf and southeastern Atlantic coasts.
brackish