Ocean Life and Resources. Ocean Life Zones. Upwelling. Upwelling : the movement of deep, cold, and nutrient-rich water to the surface. Organisms sink when they die. But these dead organisms are nutrient rich. They must be brought to the surface for other organisms to have food.
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Nekton:all organisms that swim actively in open water, independent of currents. (Fish, sharks, whales, squids, octopus).
Pelagic zone:the region of an ocean or body of fresh water above the benthic zone.
Benthos:organisms that live at the bottom of oceans or bodies of fresh water. (Sea urchins, Sea stars, sea cucumbers, sand dollars, crabs, lobsters, shrimp).
Benthic zone:the bottom region of oceans and bodies of fresh water.