anadromous
Adjective
Meaning
Ascending rivers from the sea, at certain seasons, for breeding, as the salmon, shad, etc.
Tending upwards; -- said of terns in which the lowest secondary segments are on the upper side of the branch of the central stem.
Source: Webster's dictionarySynonyms
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Examples
Salmon are anadromous, meaning they live in the sea but ascend rivers to spawn; eels are catadromous, living in rivers and streams, but returning to the sea to breed.
The steelhead anadromous form of the rainbow trout migrates to sea, but it is not termed "salmon".
The Columbia supports several species of anadromous fish that migrate between the Pacific Ocean and fresh water tributaries of the river.
The river system hosts many species of anadromous fish, which migrate between freshwater habitats and the saline waters of the Pacific Ocean.
They are anadromous fish that migrate between fresh and salt water.
Various species of salmon display anadromous life strategies while others display freshwater resident life strategies.