Among the Marvel characters, Spider-man has been the most popular character for the longest time of its history. The most attractive superpower of the Spider-man is that he shoots sticky spider webs to cling to walls or fly between buildings. Would his spider web be powerful in underwater, too? The answer is no. Because spider webs are dissolved in water and show no longer strong adhesion. However, mussels are capable of strong underwater adhesion. It is not even affected by heavy waves or storms. When a mussel is removed from a rock by force, surface of rock is also teared. That's how strong its adhesion is. Mussels produce tough fibers called byssus to attach to surface of a rock and, adhesive proteins are secreted when mussels make byssus.