Rock scallop, Crassedoma giganteum
Arena rock is just jam-packed with invertebrate life. The orange "lips" in this picture are actually the mantle of a rock scallop (Crassedoma giganteum). The bulbous clumpy soft coral is a sea strawberry (Gersemia rubiformis). These contrast with the white of the anemone, Metridium senile. "Arena Rock", North Coast, California June 4, 2006
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