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.
Bluefin Trevally
A vividly colored reef jack covered in electric-blue spots, with matching blue fins, patrolling coral reefs across the Indo-Pacific.
reef
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 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
Threadfin Trevally
An Indo-Pacific jack whose juveniles trail extraordinarily long thread-like fins, maturing into deep-bodied, steep-headed adults over sandy coastal bottoms and reef edges.
reef
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
Giant Trevally
The largest of the trevallies, a powerful, deep-bodied predator of Indo-Pacific reefs and lagoons known for its steep head profile and ferocious ambush strikes.
reef
Longfin Trevally
A moderately deep-bodied Indo-Pacific trevally recognized by its elongated, filament-like dorsal and anal fin tips, typically found alone over sandy coastal bottoms.
reef
Golden Trevally
A bright golden-yellow jack, often banded as a juvenile, found around coral reefs and lagoons throughout the Indo-Pacific.
reef
Bigeye Trevally
A large, silvery-to-black reef jack famous for forming massive, swirling daytime schools around Indo-Pacific reef passes and drop-offs.
reef
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
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
Bluefish
An aggressive, fast-swimming coastal predator famous for feeding in frenzied schools and slicing through baitfish with razor-sharp teeth.
pelagic
Green Jack
The Green Jack is a schooling eastern Pacific jack with a greenish-blue back, silvery sides, and yellowish lower fins, common in coastal surface waters.
pelagic
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
Yellow Jack
A reef-associated western Atlantic jack easily recognized by the bright yellow wash on its fins and tail, often seen patrolling reef edges in small schools.
reef
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
Cottonmouth Jack
A plain, silvery-grey deep-water jack named for the pale interior of its mouth, found over continental shelves and slopes across tropical oceans worldwide.
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
Black Jack
The Black Jack is a large, uniformly dark trevally that forms big schools around offshore tropical reefs and current-swept drop-offs across the Indian, Pacific, and Atlantic Oceans.
reef
Horse-eye Jack
A deep-bodied, silvery jack with an oversized eye, commonly seen in large stationary schools around Caribbean and Florida reefs and harbors.
reef
Cownose Ray
A migratory, schooling ray with a distinctive indented snout, famous for traveling in dense groups of hundreds along coastal waters.
pelagic
Largetooth Sawfish
One of the largest sawfish species, uniquely able to travel far up freshwater rivers, now Critically Endangered and eliminated from most of its former circumtropical range.
cartilaginous