A team of Japanese and Thai researchers has found four species of luminous land snails, only the second ... light-emitting cells located within the mantle and the foot. Previously, the only ...

A snail’s shell gets bigger because of its mantle, an organ that secretes the calcium carbonate needed to grow. The snail’s ...

ridged mantle. Slugs also move by using a moist 'foot' to help propel them across surfaces. They do not have shells. All ...