anadromous


adjective

  1. (of fish) migrating from salt water to spawn in fresh water, as salmon of the genera Salmo and Oncorhynchus (distinguished from catadromous).

adjective

  1. (of fishes such as the salmon) migrating up rivers from the sea in order to breedCompare catadromous
adj.

of fish, “ascending a river to spawn” (as salmon do), 1753, from Latinized form of Greek anadromos “running upward,” from ana “up, back” (see ana-) + dramein “to run” (see dromedary).

  1. Relating to fish, such as salmon or shad, that migrate up rivers from the sea to breed in fresh water.

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