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.
When one organism benefits and the other is harmed.
One species benefits and other is harmed
parasitism
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
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