First slide

Classification of Animals

Question

Which of the following is an ectoparasite on fishes and migrates to freshwater for spawning?

Easy

A

Lamprey
B

Eel
C

Lancelet
D

Salmon

Solution

Lamprey is ectoparasite on fishes. They exhibit anadromous migration. Adults migrate for spawning to fresh water. After spawning, within a few days, they die. Their larvae, after metamorphosis, return to the ocean.
Eel exhibits catadromous migration.
Salmon also exhibits anadromous migration but it is not a parasite.

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