WHAT'S INSIDE: MARINE LIFE
- Corals & Jellies
- Starfish & Related Organisms
- Other Marine Life
The sea spider is a sea-dwelling animal that looks somewhat like a spider. There are about 500 species.
Oysters can create pearls from a single grain of sand. How exactly does an oyster create a pearl, and what is the difference between a natural pearl and a cultured pearl?