When the structure of an animal's body shows repeating segments it is known as

When the structure of an animal's body shows repeating segments it is known as a metamere (metamerism).

Metamerism (also called segmentation) is a condition in which the structure of an animal's body shows linear series of repeating parts. Each of the body segments is known as a metamere or somites, and they are formed individually in sequence in the embryo. All organisms that belongs to the three large animal phyla which are; Chordata, Arthropoda, and Annelida are metameric.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

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