1. Phylum Chordata Vertebrates:
Fish, amphibians, reptiles, birds & mammals
Vertebrates:
Internal skeletons
Animals which have a spinal cord protected by a backbone

2. FISH Live in water Gills for gas exchange Fins for locomotion
Skeleton made of cartilage or bone
Most are covered by scales
Cold-blooded – body temp. depends on environment

4. 3 classes of fish 1. Jawless fish - agnatha
Oldest group – very primitive
Scale-less skin
Some Parasitic / some filter feed
Circular mouth with fleshy teeth
Cartilaginous skeleton

5. Hagfish & lamprey
Circular mouth
Gill slits

6. 3 classes of fish 2. cartilaginous fish= chondrichthyes
Skeleton made of cartilage
(skates, rays, sharks)
All are predatory except 4 species!
Sharks, rays, skates

7. The 4 exceptions are filter feeders
Whale sharks – warm shallow water
THE LARGEST FISH IN THE SEA!!!

8. The 4 exceptions are filter feeders
Basking sharks – cold shallow water
THE SECOND LARGEST FISH IN THE SEA!!!

9. The 4 exceptions are filter feeders
megamouth shark – cold deep water

10. The 4 exceptions are filter feeders
manta ray– shallow warm water

11. 3 classes of fish 3. bony fish - osteichthyes Skeleton of bone
Most numerous of fish species
Greatest diversity in shape and feeding habits

12. Body parts of fish
Get ready to draw a fish!!!

13. 1. Caudal fin - tail fin
Used for forward motion and acceleration

14. Singular fins
2. Dorsal fin & Anal fin
Used to prevent rolling/tipping

15. 4. pectoral fin & 5. pelvic fin
paired fins (left & right)
4. pectoral fin & pelvic fin
Used to balance, stop & turn

16. 6. Spines
Used for protection
Some contain poison sacs

17. 7. operculum
Covers & protects gills
Not found in sharks

18. 8. Lateral line
Sensory canals used to detect changes in water pressure around the fish (similar to human ear)

19. Bony Fish: Perch Dissection
Kahoot
Review!
Vs.
Cartilage Fish:
Dogfish (shark) Dissection

20. COMPARISON OF CARTILAGINOUS & BONY FISHES
TRAIT CARTILAGINOUS BONY_____
TUNA, COD, SALMON,
SHARKS, RAYS, SKATES
EXAMPLES
SKELETON
CARTILAGE
BONE
ABSENT – OILY LIVER PROVIDES BUOYANCY
PRESENT – AIR FILLED FOR BUOYANCY
SWIM BLADDER

21. COMPARISON OF CARTILAGINOUS & BONY FISHES
TRAIT CARTILAGINOUS BONY_____
EXTERNAL – LAY MILLIONS OF SMALL EGGS
INTERNAL – HAVE FEW LARGE YOUNG IN LIFE TIME
FERTILIZATION
SCALES
PLACOID – SPINY EMBEDDED IN SKIN
GANOID – PLATELIKE CTENOID & CYCLOID ARE FLAT, FLEXIBLE, OVERLAP

22. COMPARISON OF CARTILAGINOUS & BONY FISHES
TRAIT CARTILAGINOUS BONY_____
HAVE OPERCULUM COVER & PROTECT GILLS
GILLS
NO OPERCULUM HAVE GILLS SLITS
FEEDING BEHAVIOR
ALL PREDATORS FOUR EXCEPTIONS
GREAT VARIATION IN FOOD SOURCES
RIGID AND UNSEGMENTED
FLEXIBLE AND SEGMENTED
FINS
TEETH
NOT FUSED TO JAW -REPLACEABLE
FUSED TO JAW - IRREPLACEABLE