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.
Bluefish
An aggressive, fast-swimming coastal predator famous for feeding in frenzied schools and slicing through baitfish with razor-sharp teeth.
pelagic
Blobfish
A gelatinous deep-sea sculpin whose flesh is slightly less dense than water, letting it hover just above the seafloor without expending much energy swimming.
deepsea
Bluefin Tuna
One of the largest and fastest bony fish in the ocean, the Bluefin Tuna is a warm-blooded, torpedo-shaped predator capable of long transoceanic migrations across the Atlantic.
pelagic
Bluefin Killifish
A small, slender killifish native to Florida and the southeastern US, named for the iridescent blue fringe on the male's dorsal and anal fins.
freshwater
Bluefin Trevally
A vividly colored reef jack covered in electric-blue spots, with matching blue fins, patrolling coral reefs across the Indo-Pacific.
reef
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.
pelagicPacific 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
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
Pufferfish
A slow-swimming reef fish famous for inflating its body into a spiny ball when threatened, using a fused beak-like set of teeth to feed on hard-shelled invertebrates and algae.
reef
Rainbow Killifish
A vividly patterned annual killifish from Mozambique's seasonal floodplain pools, with males displaying a rainbow of red, blue and orange scale colors.
freshwater
Tuna
A fast, powerfully built open-ocean fish capable of high-speed sustained swimming, ranging across warm and temperate seas worldwide in large migratory schools.
pelagic
Rachovi Killifish
A vividly colored annual killifish from coastal Mozambique, with males showing a turquoise body and a tricolor red-yellow-blue tail. It lives in temporary floodplain pools near Beira.
freshwater
Longtail Tuna
A coastal tuna of the Indo-West Pacific with a notably slender, elongated body and a long, low second dorsal fin, often found closer to shore than other tunas.
pelagic
Honeycomb Cowfish
A boxy, rigid-bodied cowfish of the tropical western Atlantic, its bluish-green scales outlined in dark hexagonal borders creating a honeycomb pattern, with a pair of forward-pointing horns above the eyes.
reef
White Seabass
The White Seabass is a large Pacific coast drum with a bluish-bronze back and silvery sides, closely associated with California's kelp forests.
saltwater
Grey Gurnard
A bottom-dwelling gurnard with an armored, pale-spotted grey-brown back and large bluish pectoral fins, common across sandy shelf waters of Europe.
saltwater
Parkinson's Rainbowfish
A large, robust rainbowfish from the eastern rivers of Papua New Guinea, with mature males displaying a striking golden-orange rear half contrasting with a bluish-silver front.
freshwater