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.
Spanish Sardine
A schooling pelagic fish found throughout warm Atlantic and Mediterranean waters, the Spanish Sardine is larger than the related European Sardine and forms an important forage species across its wide tropical to subtropical range.
pelagic
Twaite Shad
A slender anadromous herring relative found along European and North African coasts, the Twaite Shad migrates into estuaries and rivers to spawn and is distinguished from the Allis Shad by its row of dark flank spots.
brackish
Ukrainian Brook Lamprey
The Ukrainian brook lamprey is a small, non-parasitic jawless fish that lives its entire life in freshwater streams of Eastern Europe, feeding only during a long larval stage.
freshwater
Round Goby
A bottom-dwelling goby native to the Black and Caspian Sea basins, now a widespread invasive species in the Great Lakes and parts of Europe, recognized by its fused pelvic fins and dark spot on the front dorsal fin.
freshwater
Greater Pipefish
One of Europe's largest pipefish, the Greater Pipefish is a long, tube-snouted relative of the seahorse found among seagrass and rocky shallows from Scandinavia to the Mediterranean.
saltwater
Huchen
The huchen, or Danube salmon, is Europe's largest freshwater salmonid, a powerful river predator native to the Danube basin that has become increasingly rare due to damming and habitat fragmentation.
freshwater
Allis Shad
A large anadromous herring relative native to Europe's Atlantic coast, the Allis Shad spends most of its life at sea but migrates into large rivers each spring to spawn, forming runs that have been much reduced.
brackish
Squarespot Anthias
A schooling Indo-Pacific anthias; territorial males display a bold rectangular magenta-purple patch on an orange body, while females stay uniformly peach-colored.
reef
Deep-sea Smelt
A small, silvery-bodied deep-sea fish that drifts through the dark midwater zone feeding on tiny plankton, forming a key link in deep ocean food webs.
deepsea
Skunk Clownfish
A slender, pale peach-to-pink anemonefish marked by a single white stripe running from snout to tail, living in symbiosis with sea anemones on Indo-Pacific reefs.
reef