Fish Identifier

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.

all freshwater saltwater reef pelagic cartilaginous deepsea brackish

Grass Carp

A large, torpedo-shaped herbivorous carp native to East Asia, widely introduced worldwide to control aquatic vegetation due to its voracious appetite for water plants.

Carp

A heavy-bodied freshwater fish with large, coarse scales, two pairs of barbels near its mouth, and a highly adaptable, bottom-foraging lifestyle found across much of the world.

Grass Rockfish

A stocky, olive-green rockfish adapted to very shallow rocky habitats and tide pools, among the most tolerant rockfish species of low-oxygen, wave-exposed environments.

Silver Carp

A large, filter-feeding East Asian carp famous for leaping high out of the water when startled by boat noise, and notorious as an invasive species in North American rivers.

Crucian Carp

A hardy, deep-bodied European carp closely related to goldfish, remarkable for its ability to survive winters in oxygen-depleted ponds by producing alcohol as a metabolic byproduct.

Bighead Carp

A large, big-headed East Asian carp that filter-feeds on zooplankton, closely related to the silver carp and similarly established as an invasive species in North American rivers.

Common Carp

A large, hardy, bottom-feeding fish native to Eurasia and now found worldwide, recognizable by its stout body, barbels, and long dorsal fin, and the wild ancestor of ornamental koi.

Mrigal

A slender, silvery Indian carp and one of the three traditional Indian major carps, the mrigal is a bottom-feeding scavenger with a small mouth and short barbels, farmed widely across South Asia.

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.

Rohu

A large South Asian river carp with a streamlined, silvery-grey body, widely farmed across the Indian subcontinent as a major aquaculture species and prized angling fish.

Common Bream

A deep-bodied, bronze-flanked European fish that forms large shoals in slow rivers and lakes, feeding on the bottom with a distinctive protrusible, tube-like mouth.

Catla

One of India's most important aquaculture fish, the catla is a large, fast-growing surface-feeding carp with a broad head, upturned mouth, and deep body suited to filtering plankton from open water.

Angelfish

A tall, laterally flattened cichlid from the Amazon basin, prized in the aquarium hobby for its striking triangular fin profile and extensive range of bred color varieties.

Balloon Molly

A selectively bred molly variety with a distinctive rounded, ball-shaped body caused by a spinal curvature, developed and maintained through aquarium breeding.

Goldfish

A hardy freshwater fish domesticated from the wild Prussian carp, prized worldwide as an ornamental pond and aquarium species in many color forms.

Gold Dust Molly

Gold Dust Molly

A selectively bred molly variety combining a golden-yellow base color with fine black speckling, developed in the aquarium trade from wild Poecilia stock.

Southern Platyfish

Southern Platyfish

The full common name for the widely kept platy, the southern platyfish is a small, hardy livebearer native to Mexico, Belize, and Guatemala, prized for its color variety and easy breeding.

Opaline Gourami

Opaline Gourami

A marbled blue-and-silver color variety of the Three Spot Gourami, bred for its swirling opalescent pattern while retaining the same hardy biology and behavior as the wild form.

Gold Gourami

A selectively bred, solid golden-yellow color variety of the Three Spot Gourami, developed for the aquarium trade and sharing the same hardy, adaptable biology as its wild-type relative.

Mahseer

A powerful, large-scaled carp of fast Himalayan rivers, the golden mahseer is prized as one of the hardest-fighting freshwater fish, with a thick, muscular body built for holding in strong current.

Variable Platyfish

Variable Platyfish

A close relative of the common platy, the variable platyfish is native to northeastern Mexico and shows exceptional natural variation in color and pattern, giving rise to many popular aquarium strains.

Wobbegong

A superbly camouflaged, flattened bottom-dwelling shark covered in ornate skin markings and fringed barbels that resemble seaweed or coral rubble.

Sawfish

A critically endangered ray with a long, tooth-lined snout resembling a saw, used to detect and strike schooling fish in shallow tropical waters.

White Marlin

A slender, fast-swimming billfish of the tropical and temperate Atlantic, known for its rounded fins and vivid blue-white coloration.