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.
One species benefits and other is harmed
When one organism benefits and the other is harmed.
a parasitic relationship
commensalism
parasitism
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
Commensalism is a type of relationship where one organism benefits while the other is neither helped nor harmed. In contrast, parasitism is a relationship where one organism benefits at the expense of the other, which is harmed.
commensalism