A symbiotic relationship in which one partner benefits but the other is not affected.?

This type of symbiotic relationship is known as commensalism. In commensalism, one organism benefits from the interaction while the other organism remains neutral, neither benefiting nor being harmed. An example of this is barnacles attaching to a whale; the barnacles gain a place to live and access to food particles in the water, while the whale is largely unaffected by their presence.