Description: The benthic zone of the ocean is varied. There are mountains, trenches, volcanoes, flat muddy areas, sandy areas and rocky areas. There is a wide variety of life that makes its home on the ocean floor. Some organisms live in the mud, some crawl or swim along the bottom and some anchor themselves to the ocean floor. Life in the benthos region is organized by size. Macrobenthos are organisms that are larger than one millimeter like oysters, starfish, lobsters, sea urchins, shrimp, crabs and coral. Meiobenthos are between one tenth and one millimeter in size. Organisms in this group include diatoms and sea worms. Microbenthos are very tiny...     ( +expand to view full text )

Description: The benthic zone of the ocean is varied. There are mountains, trenches, volcanoes, flat muddy areas, sandy areas and rocky areas. There is a wide variety of life that makes its home on the ocean floor. Some organisms live in the mud, some crawl or swim along the bottom and some anchor themselves to the ocean floor. Life in the benthos region is organized by size. Macrobenthos are organisms that are larger than one millimeter like oysters, starfish, lobsters, sea urchins, shrimp, crabs and coral. Meiobenthos are between one tenth and one millimeter in size. Organisms in this group include diatoms and sea worms. Microbenthos are very tiny organisms like diatoms, ciliates and bacteria. They are smaller than one tenth of a millimeter.