What material comes from sponge?

The material that comes from sponges is known as natural sponge, which is harvested from marine sponges primarily found in ocean environments. These sponges are composed of a fibrous skeleton made of a protein called spongin, along with silica and calcium carbonate. Natural sponges are used for various purposes, including bathing, cleaning, and even in art and cosmetics due to their porous and absorbent nature.