Missouri Botanical Garden
Missouri Botanical Garden: Temperate Oceans Light Zones
Discover the three zones in the ocean which are determined by the amount of light received from the sun. Pictures illustrate the three zones and there is a listing of the animals that live in each zone.
PBS
Nh Pbs: Nature Works: Ocean Zones
Discover more about the underocean environment at this site that surveys animals, environmental factors such as light and temperature, currents, animals, plants, and the like.