Answer | Crossword Clue |
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ESTUARY | Sea arm at lower end of a river. |
catadromous | of fishes, descending periodically for spawning to the lower parts of a river or to the sea also KATADROMOUS |
katadromous | of fishes, descending periodically for spawning to the lower parts of a river or to the sea, opp to anadromous also CATADROMOUS |