Fish stuff

1234567891011121314151617181920
Across
  1. 3. control their buoyancy
  2. 5. is a clade of the bony fish
  3. 7. eel-shaped slime-producing fish
  4. 9. fins are webs with bony spines
  5. 10. techincal term for gill cover
  6. 14. cavity at the end of digestive tract
  7. 16. Skeletal rod
  8. 18. serves to detect movements and pressure changes in the surrounding water
  9. 19. tail fin
  10. 20. similar to rays
Down
  1. 1. Upper chamber of the heart
  2. 2. fin on the top of a shark or killer whales
  3. 4. cold blooded
  4. 6. funnel-like sucking mouth
  5. 8. fins just behind the fish's head
  6. 11. lower chamber of the heart
  7. 12. sharks by flattened, dislike body
  8. 13. tough scales that cover the skin
  9. 15. Various small transparent marine organisms
  10. 17. Sac-like filter feeders