Question

Define Catadromous migration.

Answer 1

Migrations involve the fish moving from one part of a water body to another on a regular basis. Some particular types of migration are anadromous, in which adult fish live in the sea and migrate into fresh water to spawn, and catadromous, in which adult fish live in fresh water and migrate into salt water to spawn.

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Answer 2

(or fish) migrating from fresh water to spawn in the sea as eels of the geus anguilla