According to Encyclopedia Britannica, the pelagic zone, or open ocean, includes animals classified as either zooplankton or nekton. Zooplankton are small organisms that drift in the ocean currents and make up an enormous... More »

Animal life from the topmost to the lowest oceanic zone ranges from sharks and other fish to deep-sea squid and echinoderms such as the sea pig and sea cucumber. The oceanic or pelagic zone has every form of animal life ... More »

The ocean's average depth is 2.65 miles, which is equivalent to roughly 14,000 feet. The deepest known area of the ocean, Challenger Deep in the Marianas Trench, is 36,200 feet deep, 6.86 miles from the surface. More »

Most familiar forms of sea life occupy the neritic zone, including crabs, shrimp and zooplankton, and the animals that feed upon them, such as coral, sponges and baleen whales. The neritic zone is the relatively shallow ... More »

The term “hot zone” generally refers to any dangerous location. Entering such a location often requires protective clothing, elevated security clearances and highly specialized training. In medical usage, the term refers... More » Science Environmental Science

The ocean is important to life on Earth because of the role it plays in both the hydrologic cycle and the carbon cycle. The hydrologic cycle, also known as the water cycle or H2O cycle, refers to the relationship that ex... More »

It is not possible to give a single number to represent the average temperature of the Atlantic Ocean in its entirety, given the vast area, multiple climactic regions and varying depths that the ocean covers. There are, ... More »