One of the mysteries of the English language finally explained.
(of a fish such as the eel) migrating down rivers to the sea to spawn.The opposite of anadromous
- ‘This migration towards saltwater, in order to spawn, occurs in all catadromous species.’
- ‘Finally, there was a September eel fishery in the rivers that sustained large runs of these catadromous fish, followed by fall hunting for elk and beavers, and by December, ice-fishing for tomcod.’
- ‘Anguillid eels are catadromous, meaning that maturing individuals spend most of their lives in estuaries or freshwater but migrate to the ocean to reproduce.’
- ‘Anguilla rostrata is a catadromous species that spawns in the Atlantic Ocean and ascends streams and rivers in North and South America.’
- ‘Anadromous and catadromous species such as salmon, herring and eels are more vulnerable than cod, however, because large numbers can be taken with a few strategically placed weirs.’
Late 19th century: from cata- ‘down’ + Greek dromos ‘running’, on the pattern of anadromous.
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