Key Mccoy
Marine biology is the study of marine life, or species that live in the sea. Because many phyla, families, and genera in biology have some species that live in the water and others that dwell on land, marine biology classifies species according to their environment rather than their taxonomic classification.
The ocean is home to a substantial percentage of all life on Earth. Because many ocean species are still to be found, the exact amount of this enormous share is uncertain. The ocean is a three-dimensional realm that covers around 71 percent of the Earth's surface.
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