Torsion is a biological process that occurs during the development of certain mollusks, particularly gastropods, resulting in a 180-degree rotation of the body along its axis. This rotation causes a shift in the position of the internal organs and the body, resulting in the asymmetry commonly observed in adult gastropods, such as snails. Torsion is an important aspect of the evolutionary and developmental biology of gastropods and plays a significant role in their anatomy and behavior. The process of torsion begins during the larval stage of gastropod development. As the gastropod embryo matures into a veliger, which is the free-swimming larval stage, the body undergoes a series of changes. At this stage, the larval gastropod is bilaterally symmetrical, with its body parts arranged evenly on either side of a central axis. However, at a certain point in the development, torsion begins to occur. The initial step in torsion is the rotation of the visceral mass, which houses the mollusk's digestive and reproductive organs, along with the mantle and foot. This mass rotates counterclockwise, creating a twist along the length of the body. During this process, the gastropod’s mantle cavity, which houses gills, anus, and