Before revision: Clumping 280px|Blue mussels, Mytilus edulis, are sessile and exhibit clumping Clumping is a behavior in sessile organisms , in which individuals of a particular species group closely to one another for beneficial purposes, and can be seen in coral reefs and cochineal populations.
After revision: Clumping 280px|Blue mussels, Mytilus edulis, are sessile as exhibit clumping Clumping is a behavior in sessile organisms in which individuals of a particular species group closely to one another for beneficial purposes, and can be seen in coral reefs and cochineal populations.