A natural sponge is a marine organism belonging to the phylum Porifera. These sponges are primarily found in oceans and seas, where they attach themselves to rocks or coral reefs. They have a porous structure that allows water to flow through, enabling them to filter food particles and oxygen from the water. Natural sponges are harvested for various uses, including bathing and cleaning, due to their soft texture and absorbent properties. Unlike synthetic sponges, they are biodegradable and environmentally friendly. They come in various shapes and sizes, depending on the species and habitat in which they grow.