A group of slow-moving, soft-bodied invertebrates within the animal kingdom, commonly known as snails. They are part of the mollusk family, characterized by a coiled shell for protection. This category also encompasses other related forms of marine life such as squid and bivalves, which fall under the broad classification of animals and their specific subcategories. Snails, however, are not to be confused with amphibians as they are primarily terrestrial or aquatic in nature.