Oyster Day

123456789101112131415161718
Across
  1. 2. Rise and fall of the ocean water
  2. 3. Small crustacean popular in cocktails
  3. 7. Shellfish known for its fan-shaped shell
  4. 9. Movement of the sea’s surface
  5. 10. Mineral that makes ocean water taste briny
  6. 14. Fisherman’s tool for catching seafood
  7. 15. Marine structure formed by tiny polyps
  8. 16. Precious gem sometimes found in oysters
  9. 17. Blue-black bivalve commonly steamed
  10. 18. Underwater ridge made of coral
Down
  1. 1. Edible plant from the ocean
  2. 4. Microscopic sea life, food for whales
  3. 5. Crustacean that walks sideways
  4. 6. Safe area for docking boats
  5. 8. Shellfish celebrated on National Oyster Day
  6. 11. Protective outer layer of many sea creatures
  7. 12. Another shellfish often used in chowder
  8. 13. Large crustacean often served with butter