Adaptations, habitats, and facts about jawless fish

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Across
  1. 5. Jawless fish are _________, which means that their internal temperature depends on the temperature of their environment
  2. 7. Lampreys have a ______-cup like mouth that allows them to feed on the blood of their prey
  3. 13. Burrowing habit adaptation
  4. 16. Hagfish locate their food by _____
  5. 18. Lampreys are an invasive species in the Great Lakes
  6. 20. Lampreys are found in cool, fresh, and coastal waters of all continents except _____
  7. 21. Hagfish live near the ________ (bottom of the ocean)
Down
  1. 1. As well as jaws and paired fins, jawless fish also lack a ______
  2. 2. Hagfish use this as a defense against predators as it clogs their gills
  3. 3. A support rod that runs along the back of the fish
  4. 4. Hagfish eat ____ animals
  5. 6. Hagfish have a skull made out of this
  6. 8. Lampreys feed on the _____ of their prey
  7. 9. Lampreys have this while hagfish do not
  8. 10. Hagfish can go _____ without food
  9. 11. Hagfish skin is often marketed as ___ skin
  10. 12. Lampreys first entered Lake Erie through the _______ Canal in 1921
  11. 14. Lampreys possess _____ (#) pairs of external gills
  12. 15. Lampreys are native to the ______ ocean
  13. 17. Instead of a jaw, lampreys have a round oral ____
  14. 19. Are parasites