Most Common Fish in the Atlantic Ocean: Atlantic Herring

The Atlantic herring (Clupea harengus) is the most abundant fish in the Atlantic. A small, silvery pelagic species, it forms immense schools (millions of individuals) in the North Atlantic and adjacent seas (North Sea, Baltic, Gulf of Maine).

Ecologically, it's a keystone prey for cod, tuna, seabirds, whales, and seals. Commercially, it's harvested for food (pickled, smoked, canned), fish meal, and oil. Sustainable management is critical given its ecosystem role.