A symbiotic relationship is an interaction between two species, a relationship that benefits both species. For example the relationship of Egyptian plovers and crocodiles have. The duty of the Egyptian plover is to clean the crocodile’s mouth. The crocodile opens its mouth for the plover to enter. Surprisingly the crocodile doesn’t close his mouth until the plover gets out. The plover picks out the tiny bits of food that’s in between the crocodile’s teeth. The plover then eats the food it takes out. The crocodile is left with a clean and fresh mouth. The crocodile is left with no risk of getting any kind of infection the food left in his mouth could have provoked, thanks to the plover and the plover gets a meal thanks to the crocodile.