Life is thought to have originated in an aquatic environment—the oceans. Living organisms have since adapted to numerous aquatic habitats , both Sea nettles and jellyfish are pelagic and planktonic, meaning that they live in the water column and primarily float or drift as opposed to swimming. marine and fresh-water. They occupy environments as diverse as lakes, rivers, and oceans.
Marine Environment
About 17 percent of known biological species live in oceans. Marine species are described as either pelagic or benthic. Pelagic organisms live in the water column itself. Benthic species live on the ocean bottom. Read more
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