That would be a form of parasitism.
The relationship between species in which one benefits at the expense of the other is parasitic. An example is a tick attaching itself to an animal and feeding from it.
A symbiotic relationship is when both species need each-other to survive, for example the lynx and the hare. Without the hare the lynx would starve and without the lynx the hare would overpopulate. A parasitic relationship is where one species benefits and one is damaged.
symbiotic relationship in which one organism benefits at the expense of the other species?
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 is a non mutual symbiotic relationship between species, where one species, the parasite, benefits at the expense of the other. This would be the tick drinking the elephant's blood.
It's called a parasitic relationship when one species benefits and one species is harmed. A simbiotic relationship is when both species benefit.
One species benefits and other is harmed
commensalism
commensalismIn ecology, commensalism is a class of relationship between two organisms where one organism benefits but the other is unaffected.Malaria is parasitism:Parasitism is a type of symbiotic relationship between organisms of different species where one organism, the parasite, benefits at the expense of the host.
Commensalism is a relationship in which one species benefits. The other species not unaffected. An example would be when an animal uses a plant or tree for shelter. An American Robin benefits by making its nest in a Red Maple tree. The tree is not affected.
The definition of theatrical parasitism is an acted relationship between two parties. In such a relationship, only one party benefits at the expense of the other.
That is called commensalism.