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 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.
freshwaterBristlemouth
A tiny, worldwide deep-sea fish of the genus Cyclothone believed to be the most numerous vertebrate on Earth by sheer population size.
deepsea
French Angelfish
A large Caribbean reef angelfish with a jet-black body edged in bright yellow on each scale, giving adults a shimmering, chain-mail-like appearance.
reef
Black Neon Tetra
A small Brazilian tetra marked by a bold black horizontal stripe paired with a shimmering silvery-white line above it, a popular schooling fish in freshwater aquariums.
freshwater
Rainbow Goby
A tiny, iridescent freshwater goby whose males display shimmering blue-green and orange coloration, found clinging to rocks in fast mountain streams across the Indo-Pacific.
freshwater
Mono
A shimmering, disc-shaped fish with a strongly flattened body and tall, angular fins, native to Indo-Pacific estuaries. Adults school in brackish coastal waters and shift gradually toward full seawater as they mature.
brackish
Green Chromide
A deep-bodied cichlid from South Asian estuaries, olive-green with rows of shimmering pearly spots along its flanks. It is one of the largest brackish-water cichlids and an important species in coastal lagoon ecosystems.
brackish
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
Severum
A deep-bodied, disc-shaped Amazonian cichlid with subtle vertical banding and warm olive-gold coloration, popular for its calm temperament.
freshwater
Koi
Ornamental color varieties of the Amur carp, selectively bred in Japan for centuries into hundreds of red, white, black, and gold patterns kept in decorative ponds worldwide.
freshwater
Bolivian Ram
A hardier, calmer cousin of the German Blue Ram, this South American dwarf cichlid sports a soft gray-gold body with a ruby-edged dorsal fin.
freshwater
Spanish Mackerel
A slender, fast-swimming mackerel of the western Atlantic, easily identified by rows of bright yellow-gold spots scattered along its silvery flanks.
pelagic
Pigfish
A grunt of Atlantic and Gulf coast estuaries, marked by diagonal rows of small blue and gold spots and named for its pig-like grunting sound.
brackish
Pearl Danio
A slender, iridescent danio with a shifting pearly sheen of blue, pink, and gold along its flanks, native to fast-flowing Southeast Asian streams.
freshwater
Sauger
A slender, olive-gold relative of the walleye, best known for the rows of black spots on its spiny dorsal fin and its love of murky river currents.
freshwater
Midas Cichlid
A large, variably colored Central American cichlid, ranging from mottled gray to solid gold-orange, known for its bold and often combative nature.
freshwater
Salvini Cichlid
A colorful, feisty Central American cichlid, the salvini displays a striking mix of gold, black, and turquoise, and is known for defending territory vigorously in the rivers and lakes it calls home.
freshwaterZebra Danio
A small, torpedo-shaped freshwater fish famous for the bold horizontal blue and gold stripes running the length of its body, and widely used as a model species in scientific research.
freshwater
Mahi-Mahi
A fast-growing, brilliantly colored open-ocean fish that gathers around floating debris and sargassum, easily recognized by its iridescent blue-green-gold body and long continuous dorsal fin.
pelagic
Rudd
A deep-bodied European cyprinid known for brassy-gold flanks and vivid orange-red fins, the rudd frequents weedy lakes and slow rivers, feeding near the surface on insects and plants.
freshwater
Honey Gourami
A small, peaceful South Asian labyrinth fish whose breeding males flush a warm honey-gold to orange color with a dark throat and belly, making it a popular gentle community fish.
freshwater
Odessa Barb
A small, vividly colored barb popularized in the aquarium trade, the Odessa barb's males show a brilliant red mid-body stripe against silvery-gold flanks, especially intense during courtship displays.
freshwater