It is a type of interaction between individuals of different species where both species are harmed. For example, in some shallow South American lakes visiting flamingos and resident fishes compete for their common food, the zooplankton in the lake. The feeding efficiency of one species is reduced due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant. Therefore, competition is best defined as a process in which the fitness of one species is significantly lower in the presence of another species