diadromous fish
nounUK /daɪˈædrəməs fɪʃ/
US /daɪˈædrəməs fɪʃ/
A diadromous fish is a fish that swims between fresh water and salty ocean water during its life.
Salmon are diadromous fish because they travel from the ocean up rivers to lay their eggs.
RELATED WORDS
OTHER MEANINGS
2. A fish that moves between rivers and the sea as part of its natural life cycle.
Scientists tagged the diadromous fish to track its long journey.
3. Any fish species whose life history includes both freshwater and marine habitats.
Eels are well-known diadromous fish that live in rivers but breed in the ocean.
4. A category used by biologists for fish that migrate across salinity boundaries.
The river survey counted several kinds of diadromous fish near the estuary.