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.
Glass Knifefish
A slender, near-transparent South American fish that swims using a continuous rippling fin and emits a weak electric field to sense its surroundings.
freshwater
Glass Catfish
A small Southeast Asian catfish with an almost fully transparent body that reveals its skeleton and internal organs.
freshwater
Walleye
A slender, golden-olive freshwater predator named for its large, glassy, light-reflective eyes that give it excellent low-light vision for hunting at dusk and in murky water.
freshwater
Narrow-barred Spanish Mackerel
A large, fast-swimming mackerel of the Indo-Pacific marked by numerous narrow, wavy dark bars running down its silvery sides.
pelagic
Kryptopterus
A small, almost entirely transparent Southeast Asian catfish whose internal skeleton and organs are visible through its glass-like body, popular in the aquarium trade.
freshwater
Bay Anchovy
One of the most abundant fish in Atlantic and Gulf Coast estuaries, the tiny Bay Anchovy is a key forage species that tolerates a wide range of salinities from open bays to nearly fresh tidal creeks.
brackish
Cornetfish
An extremely elongated, needle-thin fish with a whip-like tail filament, the Cornetfish hovers near reefs and seagrass, using its long tubular snout to snap up small fish.
reef
Aiptasia-eating Filefish
A small, drab Indo-Pacific filefish prized in reef aquariums for its habit of eating Aiptasia glass anemones, blending into seagrass and algae with mottled camouflage.
reef