Jawless fish like lampreys and hagfish have no vertebrae or jaws. Lampreys are parasites with a larval stage while hagfish live on the ocean floor as scavengers. Cartilaginous fish like sharks have a skeleton of cartilage and ventral mouths. They have tails like heterocercal or homocercal tails and complex digestive systems to break down their food. They reproduce internally and give live birth.

4. buccal funnel or “mouth”

5. lampreys on lake trout

6. sea lamprey

7. atlantic hagfish

11. heterocercal tail homocercal tail TAILS:

15. shark jawbone

19. Silky Shark

22. Ampullae of Lorenzini

23. “ Techno Shark”

24. Gray Reef Shark

25. Blacktip Reef Shark

26. Great White Shark

27. Hammerhead Shark

28. Silky Shark

29. Whitetip Reef Sharks need love too...

30. Whale Shark

31. Whale Shark

32. Whale Shark

33. Southern Stingray

34. Dasyatis americana

35. Southern Stingray

36. Manta Ray

37. Manta Ray