Adjective
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 dictionarySalmon 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. Source: Internet
The steelhead anadromous form of the rainbow trout migrates to sea, but it is not termed "salmon". Source: Internet
The Columbia supports several species of anadromous fish that migrate between the Pacific Ocean and fresh water tributaries of the river. Source: Internet
The river system hosts many species of anadromous fish, which migrate between freshwater habitats and the saline waters of the Pacific Ocean. Source: Internet
They are anadromous fish that migrate between fresh and salt water. Source: Internet
Various species of salmon display anadromous life strategies while others display freshwater resident life strategies. Source: Internet