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.
Blue Devil Damselfish
A small, intensely electric-blue damselfish common on shallow Indo-Pacific reef flats, with males developing an orange-tinted tail during breeding season.
reef
Springer's Damselfish
A small, dramatic black damselfish with two vivid electric-blue stripes running along the top of its body, found on shallow reefs of the Philippines and Indonesia.
reef
Catalina Goby
A tiny, vividly colored goby with electric blue bands over a red-orange body, found perched on rocky reefs and kelp holdfasts off the Pacific coast.
reef
Blue Ring Angelfish
An Indo-Pacific angelfish named for the vivid blue ring behind its head, with adults displaying a yellow-brown body crossed by curving electric-blue lines.
reef
Bluespotted Rabbitfish
A vividly colored rabbitfish with a yellow-orange body scattered with small electric-blue spots, commonly seen grazing coral-rich reef flats across the Indo-Pacific.
reef
Coral Grouper
The coral grouper is a vivid orange-red reef fish covered in small electric-blue spots, commonly seen darting among coral heads across the Indo-Pacific.
reef
Bluestriped Grunt
A vividly striped Caribbean reef fish with a bright yellow body crossed by narrow electric-blue lines, often seen in dense daytime schools beneath reef ledges.
reef
Black Ghost Knifefish
A uniformly black, blade-shaped freshwater fish that swims using a long undulating ventral fin and navigates using a weak electric field generated along its body.
freshwater
European Ling
A very large, elongated, eel-shaped cod relative found on deep rocky and muddy grounds along the continental shelf edge of the northeastern Atlantic.
deepsea
Burbot
The burbot is the only fully freshwater member of the cod family, an eel-shaped, mottled predator found in cold lakes and rivers across the Northern Hemisphere.
freshwater
Weather Loach
An elongated, eel-shaped East Asian loach known for becoming unusually active before storms, a behavior tied to its sensitivity to changes in barometric pressure.
freshwater
Cusk
The cusk is a solitary, eel-like member of the cod family found on deep rocky bottoms of the North Atlantic, recognized by its single long dorsal fin and thick lips.
saltwater
West African Lungfish
An eel-shaped African lungfish able to survive months of drought by burrowing into mud and forming a protective cocoon while it aestivates.
freshwater
Pacific Blackdragon
An eel-like deep-sea dragonfish whose females are entirely jet-black with a long chin barbel, while the tiny, non-feeding males look almost nothing like them.
deepsea
Atlantic Wolffish
A large, eel-like cold-water fish with powerful crushing jaws, sheltering solitarily in rocky dens across the North Atlantic.
saltwater
Arctic Lamprey
The Arctic lamprey is a jawless, circumpolar species found across Arctic and sub-Arctic rivers and coastal waters of North America and Asia, recognized by its sucker mouth and slender eel-like body.
brackish
South American Lungfish
An eel-shaped South American fish that breathes almost entirely through a single lung, allowing it to survive dry seasons buried in mud.
freshwater
Dragon Goby
The Dragon Goby is a long, eel-like fish with a violet sheen and a large upturned mouth, found burrowing in muddy estuaries along the Americas' Atlantic coast.
brackish
Ornate Bichir
A striking Central African freshwater fish with an eel-like body covered in an intricate leopard-spot network pattern and a row of spiny finlets along its back.
freshwater
Ling
The ling is a long, eel-shaped member of the cod family found on deep rocky reefs of the northeastern Atlantic, distinguished by its elongated fins and single chin barbel.
saltwater
African Lungfish
An eel-like freshwater fish capable of breathing air and surviving months buried in dried mud during droughts, one of the most drought-resistant vertebrates known.
freshwater
New Zealand Hagfish
A jawless, eel-shaped scavenger that lives on muddy seafloor around New Zealand and southeastern Australia, known for producing copious defensive slime and feeding on carcasses and invertebrates on the seabed.
saltwater
Honeycomb Moray
One of the largest and most strikingly marked moray eels, its pale body covered in bold black honeycomb-shaped blotches makes it instantly recognizable across Indo-Pacific reefs.
reef
Bay Pipefish
The bay pipefish is a long, slender pipefish common in eelgrass beds and estuaries along the Pacific coast of North America, closely matching the green-brown color and shape of the eelgrass blades it hides among.
brackish