coral crossword puzzle

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