EVERYDAY SCIENCE

Detailed explanation-1: -Catadromous fish spend most of their lives in fresh water, then migrate to the sea to breed. This type is exemplified by eels of the genus Anguilla, numbering 16 species, the best-known of which are the North American eel (A. rostrata) and the European eel (A. anguilla).

Detailed explanation-2: -Fishes migrating from fresh water to marine water for reproduction is called as catadromous. Fishes migrating from marine water to fresh water for spawning or reproduction is called as anadromous.

Detailed explanation-3: -Catadromous Definition-It is the fish species that migrate from fresh water down into the sea to spawn, such as eels. Anadromous Definition-It is the fish that migrate from the sea up into freshwater to spawn, such as salmon, striped bass, and the sea lamprey.

Detailed explanation-4: -Catadromous fish are born in saltwater, then migrate into freshwater as juveniles where they grow into adults before migrating back into the ocean to spawn. Amphidromous fish are born in freshwater/estuaries, then drift into the ocean as larvae before migrating back into freshwater to grow into adults and spawn.

Detailed explanation-5: –Fresh to marine water: The fishes which live for most of the time in the river and then they migrate to sea that is to marine water for breeding, this kind of migration is termed as the catadromous migration.