A parastitic relationship. This is a relationship in which one organism benefits at the other's expense; such as barnacles attaching to whales, or fleas that need the host to feed.
parasitism
One species benefits and other is harmed
When one organism benefits and the other is harmed.
a parasitic relationship
commensalism
Parasitism
parasitism
A natural relationship in which one organism lives in or on another organism and benefits from the relationship while the other organism may be harmed is a parasitic relationship.
parasitism
parasitism
*parasitism is where one animal is helped while other is harmed* commensalism is where one is helped and other is not really affected mutualism is where both animals are helped
commensalism