1. Vertebrata
The Fishes

3. Superclass Agnatha
Jawless Fishes

4. Superclass Agnatha Class Myxini – hagfishes
Class Cephalaspidomorphi - lampreys

5. Class Cephalaspidomorphi
Suctorial mouth with horny teeth
Nasal sac not connected to pharynx
Seven pairs of gill pouches
Includes the lampreys

9. Life Cycle of the Sea Lamprey

10. Lamprey feeding

11. Superclass Gnathostomata
Jawed Fishes

12. Types of Tail Fins among Fishes

13. Types of Scales among Fishes

14. Chondrichthyes Characteristics
Heterocercal tail
Cartilaginous skeleton
Placoid scales
Five to seven pairs of gills with separate openings
No operculum
No swim bladder.
Includes the sharks, skates, rays, chimaeras.

15. External Anatomy of the Shark

16. Sensory Structures of the Head

17. Internal Anatomy of the Shark

21. Shark Diversity

23. Group Osteichthyes
Bony Fishes

24. Osteichthyes Class Actinopterygii – ray-finned fishes
Homocercal tail
Ganoid, cycloid and ctenoid scales
Includes most bony fishes
Class Sarcopterygii – lobe-finned fishes
Diphycercal tail
Dermal scales
Mostly extinct but includes lungfishes and the coelacanth

25. Class Actinopterygii
Ray-finned Fishes

26. Actinopterygii Characteristics
Fish primitively with fusiform body
but variously modified
Bony skeleton
Single gill opening on each side covered with operculum
Usually swim bladder present

29. Anatomy of the Bony Fish