1. AIM: What are the main characteristics of fishes and how do jawless fishes,cartilaginous fishes and bony fishes differ ? OBJ: Given notes and activity sheet SWBAT describe the main characteristics of fishes and how jawless fishes, cartilaginous fishes and bony fishes differ with 70% accuracy. DN: Introduction to Fish (notes) ACT: Text, read p. 86 – 92, Work on Fishes Act. Sheet ipad – eSpark Assignment HW: Complete Fishes Act. Sheet; Work on Vertebrate Review Sheets and Animal Activity Sheet. Vertebrate Exam, Dec. 3

2. Fish Characteristics ectotherms (cold-blooded) fins (movement) scales gills (respiration) water lifestyle mostly external fertilization closed circulatory system 2-chamber heart oldest & largest vertebrate group

3. Jawless Fish Characteristics No jaws No scales cartilage skeleton Example: hagfish, lampreys

4. A Face Only A Mother Could Love Fossil Record

5. Cartilaginous Fish Characteristics jaws scales cartilage skeleton carnivores Example: sharks, rays, skates

6. Sharks, Skates, Rays

7. Bony Fish Characteristics jaws scales bone skeleton gill pocket with flap swim bladder (internal gas-filled sac) most fish (95%) are bony fish. Example: trout, tuna, goldfish

9. Deep Marine Anglerfish

10. More Deep Ocean Anglerfish

12. Coelacanths are one of the most primitive types of bony fish. Their fossils range from 400 to 60 million years ago.