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Commensalism benefits one organism and the other organism is neither benefited nor harmed. It occurs when one organism takes benefits by interacting with another organism by which the host organism is not affected. A good example is a remora living with a shark. Remoras eat leftover food from the shark.
Definition. noun, plural: commensals. The organism that benefits from commensalism and does not bring any considerable injury or harm (nor benefit) to the host. adjective Of or pertaining to commensalism. Supplement. Examples of commensals are the epiphytes on trees and the barnacles on the shell of the scallops. Word origin: Latin com- (together) + mensa (table) See also: symbiosis; Related term(s): commensalism