Starfish play a big role in the ocean. They help keep the number of other animals in balance. Starfish eat animals like mussels and clams. If there were too many of these, they would crowd out other sea life. Some starfish eat coral-eating animals, which helps protect coral reefs.
Starfish are also food for other animals like big fish and seabirds. Scientists study starfish to learn about ocean health. When there are many healthy starfish, it usually means the ocean is healthy too.
1. How do starfish help the ocean?
2. What might happen if there were no starfish to eat mussels and clams?
3. How do some starfish help protect coral reefs?
4. What can scientists learn from studying starfish?