What is a "seashell"?

A seashell is a protective outer covering of various marine mollusks. They come in a wide range of shapes, sizes, and colors, and are often found washed up on beaches. Seashells serve as homes for mollusks and provide protection from predators and environmental factors. They are also cherished by beachcombers and collectors for their beauty and intricate patterns. Seashells are a fascinating reminder of the diverse and captivating marine life that exists beneath the ocean's surface.