Most shells that are found on beaches are the shells of marine mollusks, partly because these shells are usually made of calcium carbonate, and endure better than shells made of chitin.

Seashell, hard exoskeleton of marine mollusks such as snails, bivalves, and chitons that serves to protect and support their bodies. It is composed largely of calcium carbonate secreted by the mantle, …

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Ultimate guide to identifying shells. Pictures and cool facts for 63 amazing shells, including rare shells, huge shells, and a deadly shell.

Jul 20, 2022 · Shells come in a seemingly endless variety of shapes, but in fact they’re all versions of the same basic pattern: a spiral. That much is obvious in snail shells and less so in clams and other …

May 25, 2025 · In this article, I will cover and explore around 18 kinds of shells in detail which will help you with seashell identification and collection. We will also cover the question: Where do sea shells …

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