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.
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.