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  1. Horseshoe Crabs
  2. Horseshoe crabs are an _____1_____ species when compared to modern crabs.
  3. Their nearest relatives are _____2_____ which have eight legs and spin webs.
  4. These crabs occur only in the eastern United States in the _____3_____ Ocean.
  5. Although they often alarm people, they are completely _____4______.
  6. Mature horseshoe crabs can grow up to 20 _____5_____ in length.
  7. ancient
  8. novel
  9. advanced
  10. new
  11. ancient
  12. spiders
  13. blue crabs
  14. blue whales
  15. centipedes
  16. spiders
  17. Atlantic
  18. Mediterranean
  19. Indian
  20. Pacific
  21. Atlantic
  22. harmless
  23. aggressive
  24. soft
  25. sleepy
  26. harmless
  27. inches
  28. miles
  29. kilometers
  30. leagues
  31. inches
  32.