(of a fish such as the salmon) migrating up rivers from the sea to spawn.The opposite of catadromous‘Pacific salmon are anadromous (sea-run) fish that migrate from freshwater to the ocean and then back to freshwater to spawn.’
- ‘Unlike lampreys, salmon, and other anadromous fish, which migrate from the ocean to fresh water to breed, eels head in the opposite direction.’
- ‘Chinook Salmon are anadromous, making great migrations out to the deepest parts of the ocean and returning as mature adults to their natal streams.’
- ‘Although most representatives of the species are of the inland form, some populations of bull trout are anadromous and can co-exist with dolly varden char along the coast.’
- ‘For example, the anadromous osmerids typically spawn in shallow water.’
Mid 18th century from Greek anadromos (from ana- ‘up’ + dromos ‘running’) + -ous.
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