Marine snail, a mollusk that lives in the ocean and has a spiral-shaped shell, can also be described with various synonyms. Some of the commonly used words for a marine snail include sea snail, spiral snail, oceanic snail, seashell mollusk, and seashell gastropod. Additionally, depending on the specific species of the marine snail, it might also be called a cone snail, periwinkle, or limpet, among others. These variations in naming often reflect the snail's physical characteristics, habitat, or location of origin. Regardless of what it's called, marine snails come in an array of shapes, sizes, and colors and play essential roles in many marine ecosystems.