Coralliophiliid shell - Coralliophilia violacea
25mm

This snail feeds on live coral. It appears to fasten itself in one place, leaving only to feed on the coral polyps (white patch seen behind) and then returning to its secure base. The pinkish border is the coral's response to the unwelcome attack. A small red algae is growing on the shell.

Posted 14 January 2011

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