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The Ocean Depths! (1)

The Ocean Depths! (1). Wooooo - Boogey - Boogey!. Areas of the Deep Sea. How Surface Water Masses Reach The Bottom. near Greenland. “Thermohaline Circulation”. Near the Antarctic. The Great Ocean Conveyor Belt. The Mesopelagic. The Twilight Zone.

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The Ocean Depths! (1)

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  1. The Ocean Depths! (1) Wooooo - Boogey - Boogey!

  2. Areas of the Deep Sea

  3. How Surface Water Masses Reach The Bottom near Greenland “Thermohaline Circulation” Near the Antarctic

  4. The Great Ocean Conveyor Belt

  5. The Mesopelagic The Twilight Zone

  6. Deep Sea Life Is Closely Correlated With Plankton Abundance And Light Intensity Thermocline Bottom of Mesopelagic Zone – No Light exists here

  7. The Mesopelagic – Home Of The Oxygen Minimum Zone Mesopelagic

  8. Food Sources in the Deep Sea

  9. A Few Mesopelagic Critters …

  10. Mesopelagic Crustaceans Opossum shrimp krill true (decapod) shrimp

  11. A Very Large Ostracod or Seed Shrimp – This One is 1 cm in Length

  12. Mesopelagic Squid Showing Photophores Photophores, or light organs, are characteristic of many animals in the mesopelagic – they are active in bioluminescence

  13. Vampire Squid Exhibiting Photophores

  14. Typical Mesopelagic Fishes hatchetfish pacific viperfish lanternfish dragonfish barracudina longnose lancetfish

  15. Adaptations of Mesopelagic Fishes • Small body size – limited food supply • Large mouths hinged to disarticulate • Generalized omnivores with abundant, long, sharp teeth • Feeding habits – migrators and non-migrators • Sense organs – tubular eyes with 2 retinas; well-developed lateral lines

  16. Adaptations Con’t.: Coloration and Body Shape • Countershading • Transparency – especially in upper areas of mesopelagic • Lateral compression of the body • Photophores and Bioluminescence

  17. Bioluminescent Mesopelagic Fish

  18. Mesopelagic Fishes – Vertical Migrators vs. Non-Migrators Lanternfishes Dragonfishes

  19. An Adaptation for Large Prey – Hinged Jaws! Viper fish Rattrap fish Opportunists of the Deep

  20. Convergent Evolution of Tubular Eyes in Mesopelagic Organisms Krill – bilobed eye Midwater fish - Scopelarchus Deep-Sea Octopus

  21. The Field Of Vision Of A Typical Mesopelagic Fish

  22. Having Photophores Is Adaptive ! Squid Without Photophores Squid With Photophores

  23. Cross-Section of a Krill’s Photophore

  24. The Ocean Depths! (2) Wooooo - Boogey - Boogey!

  25. Below the Mesopelagic – The World of Perpetual Darkness • Below this zone which stops at about 1,000 meters is the: • Bathypelagic - 1,000 to 4,000 meters • Abyssopelagic - 4,000 to 6,000 meters • Hadopelagic – below 6,000 meters and into the trenches

  26. The Bathypelagic – Home Of Perpetual Darkness Mesopelagic Bathypelagic (upper reaches)

  27. Adaptations of Deep-Sea Pelagic Fishes An Anglerfish

  28. Adaptations In Two Closely Related Bristlemouth Fishes

  29. Some Deep-Sea Fishes Anglerfish Note very small, parasitic male Swallower Gulper

  30. The Problem Of Finding A Mate … • Produce light ! (bioluminescence) • Produce an odor ! (pheromones) • Be a parasite and attach to the other sex ! • Be a hermaphrodite and say “to heck with it” !

  31. Fish Life On the Floor

  32. The Deep Ocean Floor

  33. Characteristics Of Fish From Different Depths Of The Pelagic

  34. Anatomy Of The Giant Hydrothermal-Vent Tube Worm

  35. Sampling Methods for the Mesopelagic and Beyond … A Remote-Controlled Midwater Trawl

  36. The Chambered Nautilus – A Relic Species From The Past

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