Which of the following animals does not undergo metamorphosis?

Options

A. Moth
B. Tunicate
C. Earthworm
D. Starfish

Explanation

All the given animals except earthworm undergoes metamorphosis. Earthworm exhibits direct development where no larval stage is involved.
Metamorphosis is usually seen in animals exhibiting indirect development, involving a larval stage which later transformed into an adult.
Larval form of moth is caterpillar and that of tunicates is tadpole .
In starfish , bipinneria larva occurs.