Seashells

Seashells

Some animals grow bones inside their body. These bones are called a skeleton.

Some animals grow bones outside their body. These bones are called shells.

Some animals that live in the ocean grow seashells. These animals are called mollusks.

Mollusks are soft, but their seashells are hard, like bones. Seashells protect mollusks from other animals. Seashells are also homes for mollusks.

This mollusk lives in a seashell. Its seashell is bumpy.