Oceans | Sea life
Sea life
The oceans are filled with all types of amazing and bizarre-looking creatures. Although the Sun's light only reaches a small layer of the seawater, the majority of animals and plants live in the top sunlight regions. Microscopic organisms called plankton are the main food supply in the ocean. They live at or near the surface of the water and many produce oxygen, much of which escapes into the air for humans to breathe.
In the lower ocean regions, deep-sea creatures have developed unique adaptations to survive in the dim, high-pressure, cold waters. Many deep-water fish are bioluminescentThe chemical phenomenon in which an organism can produce its own light. or they make their own light. The anglerfish uses a lighted "lure" on the top of its head to attract prey. The flashlight fish carries bioluminescent bacteria in pouches under its eyes that it can flash on and off...
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