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.
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
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
Pristella Tetra
A translucent, pale-golden tetra whose semi-transparent body reveals internal structures, marked by distinctive black-and-yellow fin patches.
freshwater
Penguin Tetra
An Amazonian characin recognized by its bold black tail stripe and unusual head-up swimming posture resembling a penguin's stance.
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
Diamond Tetra
A deep-bodied Venezuelan characin famed for its sparkling iridescent scales, endemic to the ecologically stressed Lake Valencia basin.
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
Ember Tetra
A tiny, glowing orange-red tetra that shoals in large numbers and is among the smallest characins kept in freshwater aquaria.
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
Splash Tetra
A small South American tetra famous for its extraordinary reproductive behavior of leaping out of water in pairs to lay eggs on overhanging leaves.
freshwater
Serpae Tetra
A vividly red-bodied tetra with a bold black shoulder patch, known for its assertive, nippy temperament within shoaling groups.
freshwater
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
Lemon Tetra
A pale yellow tetra from the Amazon basin, easily recognized by its lemon-tinted body and black-edged anal fin bordered in yellow.
freshwater
Emperor Tetra
A refined, violet-blue tetra from Colombia known for a bold black lateral stripe and males' elongated, sword-like central tail rays.
freshwater
Colombian Tetra
A large, vividly rose-red characin native to northern Colombian rivers, notable for its bold coloration and confident schooling behavior.
freshwater
Congo Tetra
A large, iridescent tetra from the Congo River basin, with shimmering blue-violet-gold flanks and, in males, a distinctive flowing, frayed tail fin.
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
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
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
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
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
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
Black Skirt Tetra
A silvery-gray tetra with a flowing black skirt-like tail and fins, whose dark coloration typically fades somewhat as the fish matures.
freshwater