1. Wake-up Explain the difference between a vertebrate and invertebrate.
What are some characteristics of fish?
What are the three groups of fish?

2. Phylum Chordata Vertebrates: Fish
Christopherson

3. Characteristics of Fish

4. Fish External Anatomy Dorsal Fin Caudal Fin Scale Nostril Mouth Anus
Operculum
Anal Fin
Pectoral Fin
Pelvic Fin

5. Integument
Scales

6. Protect from attacks by predators, parasites, and other injuries
Scales Function
Protect from attacks by predators, parasites, and other injuries

7. Scales are permanent on fish
Scales are permanent on fish. They can be used to determine the age of fish.
Annulus = Year

8. Endoskeleton: Internal skeleton made up of bone
Skeletal
Endoskeleton: Internal skeleton made up of bone

9. Internal “skeleton”: Cartilage

10. Respiration
Gills
Watch video
Fish open their mouth to take in a gulp of water containing dissolved oxygen. The water moves over the gills and out through the operculum.

11. Closed system: Have a two-chambered heart
Circulatory System
Closed system: Have a two-chambered heart

12. One-way: Food comes in through the mouth and out through the anus
Digestive
One-way: Food comes in through the mouth and out through the anus

13. External fertilization: Female lays eggs and males fertilize (outside)
Reproductive
External fertilization: Female lays eggs and males fertilize (outside)

14. Video: Stop 3:47

15. Salmon Spawning Video

17. Diversity: Jawless Fish

18. Characteristics of Jawless Fish
Jaws are absent

19. Characteristics of Jawless Fish
Paired fins are generally absent

20. Characteristics of Jawless Fish
In most cases, the skeleton is cartilage

21. Can live in fresh or salt water.
Example: Lampreys
Can live in fresh or salt water.

22. Example: Lampreys
Some are parasitic

23. Lamprey Video #1
Lamprey Video #2

24. Lives in the ocean typically underground in burrows.
Example: Hagfish
Lives in the ocean typically underground in burrows.

25. Example: Hagfish
Lacks paired fins, eyes, and scales Surrounding the mouth is a ring of tentacles.

26. Hagfish produce a slime for defense (video)

27. Diversity: Cartilaginous Fish

28. Endoskeleton is entirely cartilage
Characteristics
Endoskeleton is entirely cartilage

29. Example: Sharks
Watch Video

30. Example: Skates and Rays
Watch Video

31. Diversity: Bony Fish

32. Characteristics of Bony Fish
Endoskeleton is bone

33. Largest group of vertebrates; The total number of bony fish exceed that of all other vertebrates combined. I just picked a few to feature.
Flounder Video

34. Angler Fish Video

35. Sarcastic Fringehead Video

37. Seahorse
Video