Marine Animals

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Across
  1. 2. Symmetry Same split down the middle
  2. 3. Vascular System Network of water vessels
  3. 6. an inner protective shell
  4. 8. sessile cnidarian
  5. 10. A protective outer shell
  6. 12. Generates heat internally
  7. 13. breaking out of old shell and growing into a new one
  8. 14. A free-swimming cnidarian
  9. 16. Symmetry Symmetrical on a central axis
  10. 17. a firm connective tissue
  11. 19. A form of asexual reproduction where a new individual develops from a generative point
  12. 20. Has a spine
Down
  1. 1. Both genders
  2. 4. Cold-blooded, requires outside heat
  3. 5. No spine
  4. 7. Not equally split
  5. 9. vascular organ formed during gestation of female mammals
  6. 11. Bladder Organ possessed by most bony fish, filled with gas
  7. 15. Eggs eggs that contain amnion
  8. 18. Glands: Organs that produce milk
  9. 19. Lives on sea floor