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Lottia scabra
L. scabra grows to a length of about thirty-five millimetres and has conspicuous rugged radial ribs with darker-coloured interspaces and a boldly scalloped margin. The shell is a mottled grey and tan colour and the head and the side of foot are white with black spots.
Abundant on horizontal rock surfaces on both exposed and protected coastlines. It homes at low tide to a specific site where the contours of its shell match the rock surface. Tidal pool shoreline next to Hwy 1, CA.
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