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.
Sixgill Shark
A massive, ancient-lineage deep-sea shark with six gill slits instead of the usual five, found from shallow fjords to depths beyond 2,000 m.
deepsea
Salmon
A large anadromous fish that hatches in freshwater rivers, migrates to the ocean to mature, and returns upriver to spawn, prized as an iconic sport fish.
freshwater
Sea Trout
Sea Trout is the migratory, sea-run form of the brown trout, spending its adult life feeding along European coastlines before returning to rivers to spawn.
saltwater
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
Rubber Lip Pleco
The Rubber Lip Pleco is a South American armored catfish with thick, fleshy lips adapted for grazing algae off rocks in fast-flowing rivers.
freshwater
Rainbow Wrasse
A slender Mediterranean and eastern-Atlantic wrasse; terminal males have a vivid orange zigzag stripe along a blue-green body.
saltwater
Plecostomus
A heavily armored South American catfish with a downward-facing sucker mouth used to graze algae from rocks and submerged wood.
freshwater
Reedfish
A snake-bodied African fish with a lung-like breathing organ, related to bichirs, prized for its unusual elongated form and air-breathing ability.
freshwater
Orange-lined Triggerfish
The Orange-lined Triggerfish is a dark green triggerfish covered in bold curving orange stripes, one of the most vividly patterned fish on Indo-Pacific reefs.
reef
Megamouth Shark
An enormous, gentle filter-feeding shark with a massive rounded mouth, discovered only in 1976 and still one of the rarest sharks on record.
deepsea
Madagascar Rainbowfish
An elongated, silvery rainbowfish from Madagascar's eastern rainforest rivers, recognized by its bold black-edged yellow and red fin markings.
freshwater
Julii Corydoras
A small, finely spotted armored catfish from coastal Brazil, frequently confused in the trade with the very similar Corydoras trilineatus.
freshwater
Indo-Pacific Sailfish
The Indo-Pacific sailfish is a large, streamlined billfish famed for its towering, sail-like dorsal fin and status as one of the fastest fish in the ocean.
pelagic
Longhorn Cowfish
The Longhorn Cowfish is a boxfish encased in a rigid bony shell, instantly recognizable by the pair of long horns projecting forward above its eyes.
reefLeopard Danio
A spotted color morph of the Zebrafish, the Leopard Danio trades horizontal stripes for a striking pattern of dark spots across a golden body.
freshwaterGulf Hagfish
The Gulf hagfish is a small, jawless scavenger found in deep offshore waters of the Gulf of Mexico, living on soft sediment far below the sunlit zone.
deepsea
Epaulette Shark
A small, slender reef shark famed for 'walking' across exposed reef flats on its paddle-like fins, marked by a large dark eyespot behind each gill.
reef
Cobia
A large, elongated, shark-like fish that roams warm coastal waters worldwide and often follows rays, turtles, and floating structure.
pelagic
Bluebanded Sea Bream
An Indo-Pacific reef fish, actually a snapper, marked by diagonal electric-blue bands on yellow and trailing fin filaments in adults.
reef
Celestial Pearl Danio
A tiny, jewel-like danio with a dark blue body covered in pearly spots and orange-red banded fins, discovered only in the mid-2000s in Myanmar.
freshwater
Celebes Rainbowfish
A slender, sail-finned rainbowfish endemic to Sulawesi, easily recognized by its tall, translucent dorsal and anal fins edged in black and yellow.
freshwater
Blackbarred Halfbeak
A silvery halfbeak marked with faint dark vertical bars, common over seagrass beds and reef flats across the Indo-Pacific.
reef
Black Molly
A solid-black, selectively bred color strain of the common molly, the black molly is one of the most recognizable and widely kept aquarium livebearers.
freshwater
Bat Ray
A large, dark-backed eagle ray of the eastern Pacific coast, often seen gliding over sand flats or excavating pits to unearth buried prey.
cartilaginous