Across
- 3. vent area on ocean floor where super-heated water flows out
- 5. optics use of tiny glass tubes to transmit light
- 8. sea creature with spiny skin, often has five legs
- 10. soft bodied invertebrate with a muscular foot and usually a shell
- 12. simple animal with many spores
- 13. organ that secretes a substance that forms a shell
- 15. non-segmented worms with flat bodies
- 19. end of a tubeworm's body
- 21. study of living creatures for human technology
- 22. canals tubes carrying water to the rays of starfish
- 23. animals with hollow bodies and stinging tentacles
- 26. decomposed material fertilizer
- 28. vascular system series of tubes that carry water throughout the starfish's body
- 29. mollusk with one-part shell
- 31. tiny cnidarians that grow a crusty shell around their bodies
- 32. the stage in a cnidarians life when it has hollow body with tentacles
Down
- 1. canal central canal pumping water to the ray canals
- 2. process of converting chemicals into food
- 4. worm worm that thrives near hydrothermal vents
- 6. mollusk with two-part shell
- 7. worm worm with rings or segments to its body
- 9. substance that turns bright red in the presence of oxygen
- 11. relationship two or more creatures living in a mutually beneficial way
- 14. feet rows of tubes on the underside of each starfish ray
- 16. to regrow a lost body part
- 17. openings through which water enters the water vascular system
- 18. non-segmented worms with round bodies
- 20. mollusk with a merged head and food and often no outer shell
- 24. worm-like stage in a jellyfish's life cycle before it becomes a polyp
- 25. colony a collection of thousands of coral connected together
- 26. reef a large collection of thousands of coral colonies connected together
- 27. adult stage of a jellyfish's life cycle when it has a bell shaped body
- 30. a colony of cnidarians living together to form one organism
- 33. small openings or holes