Ls 12 2 Fishes
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Transcript of Ls 12 2 Fishes
12-2 Fishes
Life Science
What is a Fish?
• Fish Characteristics– Fins– Lives in water– Most are ectotherms– Obtain oxygen through gills (from water)– Have scales
Dogfish Fins
Gills
Gills
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Fish Scales
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3 Types of Fishes
1. Jawless Fishes– Hagfish & lampreys
2. Cartilaginous Fishes– Sharks, rays, skates
3. Bony Fishes– 95% of all fish species are bony fishes– Jaws, scales, pockets for gills, skeleton,
swim bladder
Jawless hagfish
Jawless hagfish
Jawless lamprey
Jawless lamprey
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QuickTime™ and aTIFF (Uncompressed) decompressor
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Cartilaginous fishesTiger Shark
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Cartilaginous fishes
Q&A: How do sharks get oxygen?
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Difference between a stingray and skate?
•Skates do not posses venomous barbs•Skates primarily live in marine habitats and rarely enter freshwater environments•Stingrays give birth to live young while skates reproduce by laying eggs in leathery capsules
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Cartilaginous Fishes
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Cartilaginous fishes
Cartilaginous fishes
Bony Fish = 95% of fish
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