the living together of two dissimilar organisms
3 types of Symbiosis:
Commensalism ~ a type of relationship between two species of a plant, animal, fungus, etc., in which one lives, or another without damage.
Parasitism ~ a relationship between organisms in which one lives as a parasite on another.
Mutualism is the bird cleaned alligators teeth, and the bird gets nutrients.
Commensalism is fish swimming next to sharks for protection.