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.
Green Chromis
The Green Chromis is a small, shimmering blue-green damselfish that forms large schools hovering above branching coral heads on Indo-Pacific reefs.
reef
Four-Eyed Fish
A surface-dwelling brackish-water fish famous for eyes split into upper and lower halves, allowing it to see simultaneously above and below the waterline.
brackish
Fourstripe Damselfish
A white damselfish marked with three bold black bars plus a black tail, forming a four-banded pattern as it hovers around branching coral on Indo-Pacific reefs.
reef
Goldfish
A hardy freshwater fish domesticated from the wild Prussian carp, prized worldwide as an ornamental pond and aquarium species in many color forms.
freshwater
Giant Freshwater Stingray
One of the largest freshwater fish on Earth, a massive river-dwelling stingray capable of exceeding 2 meters across and hundreds of kilograms.
freshwater
Golden Wonder Killifish
A golden-orange color form of the striped panchax, this hardy topminnow patrols the water's surface hunting insects and small fish in South Asian wetlands.
freshwater
Flowery Flounder
An Indo-Pacific reef-associated flatfish densely covered in small blue rings and spots, giving a flower-like pattern, with both eyes on its upper left side.
reef
Fairy Wrasse
A dazzling small reef wrasse in which males flash iridescent shades of red, purple, and blue during courtship displays over coral rubble and reef slopes.
reef
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
Diamond Goby
A slender, sand-sifting goby with rows of orange spots, prized for cleaning aquarium sand beds. Found on shallow lagoon flats throughout the Indo-Pacific.
reef
Diamond Tetra
A deep-bodied Venezuelan characin famed for its sparkling iridescent scales, endemic to the ecologically stressed Lake Valencia basin.
freshwater
Dwarf Pufferfish
The Dwarf Pufferfish is one of the world's smallest puffers, a freshwater species from southern India prized for its tiny size and expressive, alert behavior.
freshwater
Butterfly Ray
A ray with an exceptionally wide, flattened disc and short tail, resembling a butterfly in outline as it glides low over sandy coastal seabeds.
cartilaginous
Convict Tang
A pale gray surgeonfish marked with six or seven bold black vertical bars, resembling a prisoner's uniform, that grazes algae in large schools.
reef
Common Roach
A widespread European freshwater fish with a silvery body and distinctive red-orange fins, forming large shoals in slow rivers, lakes, and canals.
freshwater
Comet Grouper
A pale grayish-brown Indo-Pacific grouper marked with elongated, comet-shaped pale streaks and spots, along with faint dark bands radiating from the eye.
reef
Coral Grouper
The coral grouper is a vivid orange-red reef fish covered in small electric-blue spots, commonly seen darting among coral heads across the Indo-Pacific.
reef
Crevalle Jack
A powerfully built, silvery jack with a steep forehead and a black spot on its gill cover, common along coastal and estuarine waters of the Atlantic.
pelagic
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
Blue-spotted Stingray
A small, brilliantly patterned stingray common on Indo-Pacific coral reefs, instantly recognizable by its electric-blue spots and blue-striped tail.
reef
Black Phantom Tetra
A gray-black Paraguay basin characin known for its dramatic sail-like dorsal fin displays and mild social hierarchy behavior among males.
freshwater
Barreleye
The barreleye, or spookfish, is a deep-sea fish with a transparent, dome-shaped head revealing barrel-shaped, upward-rotating tubular eyes, unlike any other fish.
deepsea
Barred Mudskipper
An amphibious mangrove goby with bulging eyes and muscular fins that lets it crawl and hop across exposed mud at low tide throughout the Indo-Pacific.
brackish
Betta
A small, vividly colored Southeast Asian freshwater fish famed for its flowing fins and the intense territorial aggression of males toward rivals.
freshwater