Bring back oysters

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Across
  1. 3. Animals grow on top of each other to form a hard rock
  2. 6. Animal loses environment
  3. 7. A small animal that lives in shallow waters around the world
  4. 10. Blocking waves that can wash away sand and soil
  5. 11. Harmful to an environment
  6. 13. Over hunting species
  7. 17. Not common
  8. 18. Occurs when rising water is pushed onto land
  9. 21. Hard outer covering made of the mineral calcium carbonate that protects the oyster
  10. 22. Opens and closes the shell
  11. 25. Tiny, immature oysters
Down
  1. 1. To be under the water
  2. 2. Shell is made up of two halves that is held by a hinge
  3. 4. Pumps water through the oysters bodies
  4. 5. To pull something up
  5. 8. Skin-like covering that protects the oyster’s organs
  6. 9. A community of organisms interacting with their nonliving environment
  7. 12. Sorts and transfers food from the gills to the digestive tract
  8. 14. Holds the two halves of the oyster’s shell together
  9. 15. At risk of harm
  10. 16. Extract oxygen from the water so the animal can breathe underwater
  11. 19. Digests algae stuck in gills
  12. 20. Species Vital to their ecosystem
  13. 23. Adjustable tools
  14. 24. Pumps the oysters blood