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Description of commensalism

Give a brief description of the term commensalism?

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Commensalism is ecological interaction in that one individual benefits while other is neither benefited or nor harmed. Commensalism is a harmonious (positive) ecological interaction, because none of participants is harmed. An instance of commensalism is various bacteria that live in skin and in digestive tube of humans without being pathogenic or helpful. They are innocuous bacteria living in commensalism with the humans.

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