oceanodromous fish

Oceanodromous fish are migratory species that live and travel entirely within saltwater environments. Their migrations, which can span vast distances, are influenced by oceanographic conditions and currents. These movements are directional, meaning the fish actively navigate rather than passively drifting.123

Examples of oceanodromous fish include herring and cod, which undertake seasonal migrations for spawning and feeding. Bluefin tuna also exhibit transoceanic migrations, traveling across the Atlantic for feeding and reproduction. The specific patterns and extent of these migrations vary among species and populations.24