Mutualism is when two different species maintain a relationship that serves them both equally, and these relationships can be mutually beneficial and non-symbiotic. The association is symbiotic when the two involved organisms are incredibly close. The relationship is also considered to be symbiotic if at least one of the two organisms need the other, and without that contact, they would die.
Two examples of mutualism include the bees and the blossoms. The bees rush from flower to flower in pursuit of nectar, which they convert into food, and it benefits them. When bees are placed on a flower, particles of pollen stick to their body, such as particles moved to other flowers, and the outcome is plant pollination—the crab spider and algae.
Spider crabs devote much of their lives in places where the water is shallow, which creates more possibility that predators see them. However, on the back of the crabs, a specific type of algae acts as a camouflage for the animal. The plant also benefits because it discovers a nice place to live. Mutualism plays a significant role in ecology and evolution.