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.
Atlantic Bluefin Tuna
A massive, torpedo-shaped, deep blue-backed tuna built for speed and long-distance migration across the Atlantic Ocean and Mediterranean Sea.
pelagic
Koran Angelfish
A large Indo-Pacific angelfish whose adults show a blue-green body scattered with pearly blue spots and lines, while striking juveniles display concentric blue and white circular bands.
reef
Mozambique Tilapia
A hardy, deep-bodied cichlid native to southeastern Africa, the Mozambique tilapia tolerates a huge range of salinities and temperatures and has become one of the world's most widely introduced freshwater fish.
freshwater
Mako Shark
The fastest shark species, built for speed with a sleek, metallic blue body, pointed snout, and crescent-shaped tail, roaming open temperate and tropical oceans worldwide.
cartilaginous
Majestic Angelfish
A boldly patterned western-Pacific angelfish with orange body, blue-edged bands, and a blue lower body.
reef
Bluespine Unicornfish
A large Indo-Pacific tang with a bony forehead horn and paired fixed blue-white spines at the tail base, browsing brown macroalgae on coral reefs and reef flats.
reefPacific Bluefin Tuna
A massive, warm-bodied tuna capable of ocean-basin migrations across the entire North Pacific, recognized by its deep, torpedo-shaped body and short pectoral fins.
pelagic
Southern Bluefin Tuna
A large, deep-bodied tuna of the Southern Hemisphere's open oceans, distinguished by very short pectoral fins and a single spawning ground south of Indonesia.
pelagicBluestripe Fangblenny
An elongated blenny with a blue-and-black striped body that mimics cleaner wrasse to approach unsuspecting fish, using enlarged fangs to nip scales, mucus, or tissue before darting away.
reef
Regal Tang
An unmistakable royal-blue surgeonfish with a black palette pattern and bright yellow tail, popularized worldwide as the character Dory, commonly seen darting among branching corals.
reef
Sailfin Snapper
The sailfin snapper is a striking Indo-Pacific reef fish with blue diagonal stripes, yellow fins, and a tall, flowing dorsal fin, often seen over sand patches near coral reefs.
reef
Dwarf Gourami
A small, colorful labyrinth fish from South Asia, with males displaying vivid diagonal red and blue stripes, popular in the freshwater aquarium trade.
freshwater
Common Skate
One of the largest skates in the world, now Critically Endangered after severe historical overfishing across its North Atlantic range.
cartilaginous
Spanish Hogfish
A colorful western-Atlantic wrasse with a purple-blue upper front and yellow rear, and a well-known juvenile cleaning habit.
reef
Forktail Rainbowfish
A tiny, colorful blue-eye rainbowfish from New Guinea named for its distinctively forked, yellow-edged tail fin.
freshwater
Egg-laying Killifish
A general term for the many oviparous killifish species that scatter fertilized eggs rather than bearing live young, exemplified by the widespread blue panchax of South and Southeast Asian wetlands.
freshwater
Palette Surgeonfish
The vivid blue-and-black Blue Tang, famous for its palette-shaped markings and bright yellow tail; an Indo-Pacific coral reef species that feeds mainly on drifting plankton rather than algae.
reef
Wideband Clownfish
A dark brown-to-black anemonefish with a single thick white band across the mid-body, restricted to temperate-edge reefs around Lord Howe Island, eastern Australia, and New Caledonia.
reef
Yellow Boxfish
The Yellow Boxfish is a cube-shaped reef fish, bright yellow with black spots as a juvenile, that swims with slow, hovering movements thanks to its rigid armored body.
reef
Yellowtail Wrasse
A striking Indo-Pacific wrasse whose bright red spotted juveniles transform into green-blue adults with a yellow tail.
reef
Snowy Grouper
A dark gray-brown deepwater grouper of the western Atlantic; juveniles are boldly marked with white spots that fade to a plainer, darker pattern in large adults.
deepsea
Mutton Snapper
A rosy-pink Western Atlantic reef snapper marked by blue eye-lines and a small black spot below the dorsal fin, with elegantly pointed fin tips.
reef
Boxfish
A rigid, box-shaped Indo-Pacific reef fish encased in fused bony plates; juveniles are bright yellow with black spots, dulling to olive-grey tones as adults.
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