coral reef
Plural
coral reefs
1
a natural underwater structure formed by coral
- The coral reef near the island is teeming with colorful fish.
- Snorkeling over a coral reef is an unforgettable experience.
- The Great Barrier Reef is the largest coral reef system in the world.
- Scientists are studying ways to protect coral reefs from bleaching.
- Coral reefs are often called the rainforests of the sea.