Biotic Factors in the Ocean

Reviewed by: BD Editors

Saline oceans cover about 71% of the Earth’s surface and hold 97% of the planet’s water. The oceans are home to around 230,000 species of organisms.
Some of the mammals that live in the ocean are whales, seals, sea lions, dolphins, sharks, porpoises and walruses. The over 20,000 species of fish include tuna, cod, salmon, blue marlin, mackerel, halibut, sardines, flounder and grouper. Other creatures in the ocean include jellyfish, octopus, sea turtles, squid, lobsters, shrimp, krill, marine worms, eels, plankton, starfish, seahorses, sea cucumbers and sand dollars. Kelp, seaweed, algae and coral are some of the plants that live in the ocean.

Blue Whale
Blue Whale


  • Ocean. (n.d.). In Wikipedia. Retrieved July 11, 2017 from

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MLAAPAChicago Editors. "Biotic Factors in the Ocean." Biology Dictionary,, 30 Jul. 2017, Editors. (2017, July 30). Biotic Factors in the Ocean. Retrieved from Editors. "Biotic Factors in the Ocean." Biology Dictionary., July 30, 2017.

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