Arthropods

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Across
  1. 8. fear of spiders
  2. 9. a mature female blue crab carrying a mass of fertilized eggs on her abdomen
  3. 11. an organism with 10 legs
  4. 13. outer shell covering
  5. 14. the first fin you see located on the top side of a shark
  6. 15. the protective external skeleton of arthropods
  7. 18. the contraction of waves to digest food
  8. 19. the fin of a shark that is located on its stomach side
  9. 20. an adult male blue crab
Down
  1. 1. a small crab that molts many times over a 12-18 month period
  2. 2. the tough substance that makes up an exoskeleton
  3. 3. the head of a horseshoe crab
  4. 4. the first stage of larval development in a blue crab
  5. 5. the largest phylum of creatures on Earth
  6. 6. allows sea spiders to suck nutrients from invertebrates
  7. 7. the tail fin of a shark
  8. 9. a mature female blue crab
  9. 10. the periodic shedding of an animals's exoskeleton as it grows
  10. 12. the tail of a horseshoe crab, used to help flip it over
  11. 16. the central area of a horseshoe crab's anatomy
  12. 17. an immature female blue crab