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Oceans are by far the largest animal habitat on earth. The oceans are so huge it is hard for scientists to explore them. Information on ocean animals is not as complete as information on land animals. It is known that animal life can be found at all depths of the ocean, from the surface to the deepest trenches that are over seven miles below the surface.
Some ocean animals spend most of their life in the waters near the land. Others live most of their life in the deeper open sea. Even though the open sea is the largest habitat, it is estimated that only five percent of the world’s animal species live there.
More Ocean information