1. GO FISH

2. FISH: a vertebrate that lives in water and uses fins to move
Domain:
Eukarya
Kingdom:
Animalia
Phylum:
Chordata
(Chordates)
3 Classes of
Fish

3. All Fish … Have Fins Breathe with gills
Live their entire life in water
Most have scales
Are Cold-blooded (ectotherm)

4. The 3 Classes of Fish are
Jawless
Cartilage
Bony

5. First fish were jawless: They were restricted to sucking and scraping for food
Once jaws evolved fish were able to bite and chew

6. Jawless Fish
Lampreys and hagfish are the only two jawless fish.
Characteristics of Jawless fish:
Long and snake like
No proper skull
Skin is tough and slimy with no scales
No jaw
Cartilage skeleton

7. Cartilage Vs. Bone Skeletons
Cartilage is rubbery and flexible
Bone is hard and rigid

8. Hagfish

9. A Lamprey’s Mouth

10. Lamprey

11. Cartilage Fish Sharks, rays, and skates Characteristics
Skeleton made of cartilage
Sharks have tiny scales called denticles
Have proper jaws and skulls
Shark Denticles

12. Sharks

13. Skate

14. Sting Ray

15. Bony Fish Characteristics Skeleton made of bone
95% of all fish are bony
Streamlined bodies
Covered with scales
Swim bladder to navigate depth in water

16. A sea horse is a bony fish.

17. Salmon