Ch 18 Fish

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Across
  1. 2. function of the swim bladder for most fish
  2. 4. gill covering of holocephalians and bony fish
  3. 9. lobe-finned bony fishes
  4. 10. hagfishes, very slimy
  5. 11. jawless fishes
  6. 12. sharks, skates, rays, chimera
  7. 13. sharks but not holocephalians
  8. 16. _______-exchange maximizes gas exchange in fish
  9. 17. lampreys to scientists
  10. 18. fish respiratory structures
  11. 19. clade of fish with four legs
Down
  1. 1. ______-line system senses vibrations in water
  2. 3. lays eggs that hatch internally
  3. 5. scale type of a shark
  4. 6. craniate infraphylum excluding hagfishes
  5. 7. animals with live birth
  6. 8. jawed fishes
  7. 12. chordate clade of fish, frogs, snakes, mice
  8. 14. egg-laying animals
  9. 15. ray-finned bony fishes