Sharkfin, Lana'i, 25 feet, 22mm

Very rare in caverns at any depth.  Glossy orange brown, inflated with protruding extremities, distinct marginal callous, prominent dorsal groove.  Attains nearly 1 inch.  Endemic to Hawaii.  This and Cypraea pseudonucleus belong to a Hawaiian species complex/range of hybrids between endemic Cypraea granulata and Indo-Pacific Cypraea nucleus.