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.
Red Gurnard
A reddish-pink bottom-dweller of European seas, the Red Gurnard has an armored head and finger-like pectoral rays it uses to walk and sense prey along the seafloor.
saltwater
Severum
A deep-bodied, disc-shaped Amazonian cichlid with subtle vertical banding and warm olive-gold coloration, popular for its calm temperament.
freshwaterSevruga
The sevruga, or starry sturgeon, is a slender anadromous sturgeon of the Caspian, Black, and Azov Sea basins, known for its long upturned snout and rows of star-shaped bony scutes.
brackish
Shortfin Molly
A hardy, adaptable livebearer native to Mexico and Central America, prized in the aquarium trade for its tolerance of varied water chemistry.
freshwater
Shortbill Spearfish
A slender billfish with an unusually short bill relative to its body, found in warm offshore waters worldwide and considered the smallest of the true spearfish.
pelagic
Rock Bass
A robust, bronze-colored sunfish relative with striking red eyes, often found around rocky cover in clear streams and lakes of eastern and central North America.
freshwater
Rock Cook
A tiny olive-brown wrasse of northeastern Atlantic kelp reefs, the Rock Cook forages among rocks and crevices and can change sex during its lifetime.
saltwater
Rosy Loach
The Rosy Loach is a tiny, delicately colored nano loach from Myanmar's slow-moving, vegetated streams and pools, prized for its diminutive size and rosy-pink hues.
freshwaterRock Gunnel
A slender, eel-like intertidal fish of the North Atlantic, the Rock Gunnel hides under rocks and seaweed and is marked by a row of pale-ringed spots along its dorsal fin.
saltwater
Pacu
A large Amazon and Orinoco characin related to piranhas but herbivorous, identified by its reddish belly and flattened, fruit-crushing teeth.
freshwater
Peacock Grouper
The peacock grouper is a dark-bodied reef predator patterned with bright blue spots and pale bars, native to the Indo-Pacific and introduced to Hawaiian waters.
reef
Pristella Tetra
A translucent, pale-golden tetra whose semi-transparent body reveals internal structures, marked by distinctive black-and-yellow fin patches.
freshwater
Ocean Sunfish
The ocean sunfish is the heaviest bony fish alive, a flattened giant with no true tail that drifts through temperate and tropical seas feeding on jellyfish.
pelagic
Pink Salmon
The smallest and most abundant Pacific salmon, notable for its strict two-year life cycle and the pronounced dorsal hump males develop when spawning.
freshwater
Pallid Sturgeon
The pallid sturgeon is a large, pale, endangered fish of the Missouri and Mississippi rivers, adapted to fast, turbid water with a flattened snout and reduced eyes.
freshwater
Pelagic Stingray
A uniquely oceanic stingray that never touches the seabed, drifting through warm and temperate seas worldwide while feeding on squid and small fish.
pelagic
Marlin
A large, powerful open-ocean billfish with a long rounded spear-like bill and a tall crested back, prized as one of the ocean's fastest and most sought-after game fish.
pelagic
Neon Damselfish
A small, brilliant iridescent blue damselfish with a touch of yellow on the tail, commonly seen in loose groups over rubble and coral on Indo-Pacific reefs.
reef
Marbled Hatchetfish
A tiny South American fish with a deep, keeled belly and enlarged pectoral fins that let it skim and glide just above the water surface to escape predators.
freshwater
Greenland Halibut
A cold-water, deep-sea North Atlantic and Arctic flatfish with a dark body on both sides, a large toothy mouth, and a less flattened posture than typical flounders.
deepsea
Humbug Damselfish
A small white damselfish marked with three bold black bars and a clear tail, living in tight groups among the branches of Indo-Pacific coral colonies.
reef
Kawakawa
A compact, fast schooling tuna of the Indo-Pacific with a wavy dark pattern on its back and several distinctive dark spots between the pectoral and pelvic fins.
pelagic
Fairy Wrasse
A dazzling small reef wrasse in which males flash iridescent shades of red, purple, and blue during courtship displays over coral rubble and reef slopes.
reef
Fathead Minnow
A small, hardy North American minnow famous as baitfish and a standard toxicology test species, able to survive low-oxygen, turbid water most fish avoid.
freshwater