Across
- 4. bio composites of calcium carbonate
- 6. coral reef that encircles a lagoon.
- 7. phylum that coral, hydra, sea anemones, and jellyfish live in.
- 9. stinging cells
- 10. basis for coral reefs.
Down
- 1. coral reef close to the shore.
- 2. live in coral and provide color.
- 3. coral reef running parallel to the shore but separated from it by a channel of deep water.
- 5. classified as hexacorallia and contributes to building reefs.
- 8. classified as octocorallia and does not contribute to building reefs.