The giant Pacific rock scallop <i><a href="//commons.wikimedia.org/wiki/Crassedoma_giganteum" class="mw-redirect" title="Crassedoma giganteum">Crassedoma giganteum</a></i> lives with one valve attached to the rock and the other free to open and close. A sponge covers the shell entirely.
Steve Lonhart (SIMoN / MBNMS)
2005-09-16
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