ca·tad·ro·mous /kəˈtædrəməs/
(a.)為產卵順流而下的
Ca·tad·ro·mous a.
1. Bot. Having the lowest inferior segment of a pinna nearer the rachis than the lowest superior one; -- said of a mode of branching in ferns, and opposed to anadromous.
2. Zool. Living in fresh water, and going to the sea to spawn; -- opposed to anadromous, and said of the eel.
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catadromous
adj : migrating from fresh water to the sea to spawn [ant: diadromous,
anadromous]