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