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.
Spanish Grunt
The Spanish grunt is a deep-bodied, silvery-yellow reef grunt of the western Atlantic and Caribbean, marked by dark scale rows and a large mouth used to crush hard-shelled prey.
reef
Slender Giant Moray
The longest of all moray eel species, this extremely elongated, olive-grey eel patrols muddy estuaries and mangrove channels across the Indo-Pacific rather than typical coral reef.
brackish
Redlip Blenny
A dark, elongated blenny with a distinctive bright red-orange lip, common on shallow Caribbean and western Atlantic reef edges where it grazes algae from rock and coral.
reef
Peacock Flounder
A tropical Atlantic flatfish famous for rapid color-changing camouflage and a pattern of small blue rings on a sandy brown body, with both eyes clustered on its upper left side.
reef
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.
freshwater
Mekong Giant Catfish
One of the largest freshwater fish on Earth, this critically endangered giant inhabits the deep main channel of the Mekong River and undertakes long spawning migrations.
freshwater
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.
freshwater
Java Rabbitfish
A greenish-brown rabbitfish patterned with fine wavy vermiculated markings, commonly found in mangrove-lined estuaries and brackish coastal waters of the Indo-Pacific.
brackish
Longspine Snapper
The longspine snapper is a slender, bright red deepwater snapper known for an elongated filament trailing from its dorsal fin, found on steep offshore slopes across the Indo-Pacific.
deepsea
Leafy Seadragon
An extraordinary seahorse relative covered in ornate leaf-shaped appendages, camouflaging almost perfectly among the kelp and seaweed beds of southern Australia.
reef
Kryptopterus
A small, almost entirely transparent Southeast Asian catfish whose internal skeleton and organs are visible through its glass-like body, popular in the aquarium trade.
freshwater
Island Trevally
The Island Trevally is a deep-bodied jack found around Indo-Pacific reefs, recognized by faint yellow-orange spots scattered along its silvery flanks and a forked yellow tail.
reef
Gudgeon
A small, bottom-dwelling cyprinid with a pair of sensory barbels at the mouth corners, the gudgeon forages over gravel and sand in loose shoals, well camouflaged among stones.
freshwater
Giant Grouper
The largest bony fish found on coral reefs, the giant grouper is a massive Indo-Pacific predator with a huge head and mouth, capable of ambushing prey as large as small sharks and turtles.
reef
Giant Gourami
The largest gourami species, a deep-bodied Southeast Asian labyrinth fish that can exceed two feet in length and shifts from an insect-eating juvenile diet to a largely plant-based adult diet.
freshwater
Grunt Sculpin
A small, oddly shaped sculpin with an elongated, beak-like snout and orange-and-brown striped body, famous for mimicking the appearance of an empty giant acorn barnacle shell.
saltwater
Goliath Grouper
One of the largest bony fish on Atlantic reefs, the goliath grouper is a massive, mottled brown ambush predator that shelters around wrecks, caves, and mangrove-lined shorelines.
reef
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
Green Sunfish
A hardy, aggressive small sunfish with a large mouth and dark greenish-blue body marked with yellow-green flecking, tolerant of poor water conditions where few other sunfish can survive.
freshwater
Giant Oceanic Manta Ray
The largest ray in the world, a black-and-white filter feeder with enormous triangular pectoral fins and distinctive cephalic lobes used to funnel plankton into its mouth.
cartilaginous
Foxface Rabbitfish
The Foxface Rabbitfish has a bright yellow body, a distinctive black-and-white striped face, and venomous dorsal spines, and is often seen grazing algae on reef flats in pairs.
reef
Cleaner Wrasse
The Cleaner Wrasse is a slender fish with a bold black horizontal stripe and blue body, famous for removing parasites and dead tissue from other reef fish at dedicated cleaning stations.
reef
Clown Triggerfish
An unmistakable black-bodied Indo-Pacific triggerfish covered in bold white spots below, with yellow-orange lips; wedges into reef crevices using a locking dorsal spine.
reef
Chub
A robust, thick-shouldered cyprinid of European rivers, the chub is a wary predator-scavenger that lurks under banks and cover, feeding on anything from insects to small fish.
freshwater