Nutritional Symbiotic Relationship Between Dogs and Ticks A nutritional symbiotic relationship occurs when two or more species have an interaction with each other that is beneficial to the animal. There are several types of symbiotic relationships, including parasitism, when an organism benefits from a host animal that is harmed by the interaction, commensalism, when one animal benefits and the other is unaffected and remains neutral, and mutualism , when both animals benefit from the interaction. Although there are three different types of relationships, some of them can occur in different places inside or outside the body. Endosymbiosis occurs when a species has a symbiotic relationship within the host's body, such as mitochondria and chloroplasts. Ectosymbiosis occurs when a species has a symbiotic relationship outside of the host's body. There are many examples of symbiotic relationships such as a cleaner fish, bees and honey, a clown fish and a sea anemone, and finally a dog and ticks. Dogs and ticks have an ectosymbiotic parasitic relationship with each other, meaning that...