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The Elasmobranchs

The Elasmobranchs. Order Lamniformes Order Orectolobiformes Order Carcharhiniformes Order Squaliformes Order Rajiformes Order Pristiformes Order Torpediniformes Order Myliobatiformes. Spiny Dogfish. Skate. Order Lamniformes. Mackerel Sharks Sandtiger shark Basking, Megamouth

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The Elasmobranchs

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  1. The Elasmobranchs • Order Lamniformes • Order Orectolobiformes • Order Carcharhiniformes • Order Squaliformes • Order Rajiformes • Order Pristiformes • Order Torpediniformes • Order Myliobatiformes Spiny Dogfish Skate Lamniformes

  2. Order Lamniformes • Mackerel Sharks • Sandtiger shark • Basking, Megamouth • Mako, Great White • Thresher Sharks Lamniformes

  3. Sand Tigers Odoutaspis taurus Spotted Raggedtooth Grey Nurse Shark Lamniformes

  4. Sand Tigers • Cannibal viviparous • 2 young • 9-12 month gestation • Neutral Buoyancy • Gulps air & fills stomach • Complex behavior • Vulnerable Lamniformes

  5. Basking Shark • Elongate gill rakers for straining food • May reach 14 m (49 ft) Lamniformes

  6. Cetorhinus maximus

  7. Megamouth • Megachasma pelagios • Discovered in 1976 • Inhabits deepwater • Large mouth filter feeds • Mouth is lined with photophores to attract prey Lamniformes

  8. Mako • Possibly the fastest shark in the world Lamniformes

  9. Great White Shark • Efficient predator • “warm-blooded” • Highly migratory • Annually b/t Mexico & Hawaii Dark blotch Lamniformes

  10. Lamniformes

  11. Thresher Shark Lamniformes

  12. Order Orectolobiformes • Nurse Shark • Possess long tactile and chemosensory barbels • Shallow water, benthic dweller • Suction, crushing feeder Lamniformes

  13. Whale Shark • Largest fish • 19 m (60 ft) • Plankton feeder • 300 pups! Lamniformes

  14. Lamniformes

  15. Order Carcharhiniformes • Ground Sharks • Requiem Sharks • Bull, Whitetip, Reef, Tiger, and Blue • Hammerhead Lamniformes

  16. Hammerhead Shark • Head Function • Increase peripheral vision • Increase surface area for ampullae • Cephalofoil = lift Scalloped Hammerhead Lamniformes

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