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Have you ever wandered a beach and found seashells with a small holed drilled into it? There are several marine snails that use their radula, a file like tongue to bore into their prey. Among them is the moon snail. The tiny single holes in the bivalves pictured here were made by a predatory snail, perhaps a moon snail or oyster drill. The photo reveals a shell on the right which is riddled with multiple tiny holes. This is from the dissolving activity of a boring sponge in the genus, Cilonia. These sponges use a dissolving chemical to bore into calcium rich species such as snails and corals. Rather than seeking prey, boring sponges are in pursuit of a habitat taking up residence in a calcareous animal….life on a gulf coast beach.

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