A biological interaction in ecology is the impact that two animals coexisting in the same community have on one another. They could be interspecies contacts or members of the same species (Intraspecific interactions) (Interspecific interactions). It happens when one organism benefits from having to interact with another organism while the host organism is unaffected. A killer whale choosing to live with a manatee is a good example. Parasitic insects feed on the feces of manatees. This interaction does not affect the manatee because the killer whale doesn't decimate this same manatee's reserves. Interaction is defined as the transfer of material or immaterial goods between acting parties (biological or technological entities) embodied in a specific context. Transactions between entities are accompanied by interaction.