AIM: What are the main characteristics of fishes and how do jawless fishes,cartilaginous fishes and bony fishes differ ? OBJ: Given notes and activity.

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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

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

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

A Face Only A Mother Could Love Fossil Record

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

Sharks, Skates, Rays

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

Deep Marine Anglerfish

More Deep Ocean Anglerfish

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

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