Marine ecosystem
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Marine ecosystems are the largest of Earth's aquatic ecosystems and exist in waters that have a high salt content. These systems contrast with freshwater ecosystems, which have a lower salt content. M
Coral reefs form complex marine ecosystems with tremendous biodiversity.
Coral reef
Mangrove forests
Seagrass meadow
Marine biology
Videos
Marine biology is the scientific study of the biology of marine life, organisms that inhabit the sea. Given that in biology many phyla, families and genera have some species that live in the sea and o
Marine biology studies species that live in marine habitats. Most of the Earth's surface is covered by ocean, which is the home to marine life. Oceans average nearly four kilometers in-depth and are fringed with coastlines that run for about 360,000 kilometres.
Coral reefs provide marine habitats for tube sponges, which in turn become marine habitats for fish
Tide pools with sea stars and sea anemone
Estuaries have shifting flows of sea water and fresh water.