Molluscs have a vast habitat, from the tropical continent to the Arctic and Antarctic oceans, from highland ponds above 7,000 meters above sea level to deep seas below 800 meters. Molluscs are second only to arthropods-there are more than 100 thousand species. They vary greatly in form, but they all have soft bodies. Most of them live in the ocean, and only some bivalves and gastropods migrate to brackish and fresh water.
The soft surface of the body has a coat
The system is symmetrical on both sides, the body is not segmented, it has a mantle, shells, and the body cavity is a real body cavity, but it is underdeveloped
Most species are androgynous or even heteromorphic, and a few species are androgynous.
Edible value Rich in protein, inorganic salts and vitamins, has a high nutritional value.
Industrial Value Thicker shells in the nacre (such as clams, horseshoe snails, etc.) are the raw materials for buttons
Mollusca (Latin name: Granulifusus kiranus) is an invertebrate mollusca, the largest group except arthropods, with about 100 thousand species. The system varies greatly, but has common characteristics: the body is soft and unsegmented, generally divided into two parts-foot-foot (some head degeneration or disappearance; foot muscle mass) and visceral-mantle (composed of dorsal visceral mass, mantle and mantle cavity).
