Oyster Oysters Oysters have bi-valved shells to protect their soft bodies. The shells are attached to each other on one side with a hinge. When oysters are very young, they swim around. Grown-up oysters attach themselves to rocks or other hard objects on the bottom of the ocean. They wait for tiny plants and animals to come to them in the water.
Oysters lay millions of eggs.
The oyster does not live very long because it has lots of enemies.