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The Elasmobranchs

The Elasmobranchs

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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