Sand Is., Oahu, 1 foot, 20mm

Diamond Head, Oahu

Portlock, Oahu

Abundant on and under rocks in the intertidal zone where it feeds upon bivalves and dead mollusks.  The dull black shell is usually  eroded and coated with coralline algae.  Feeds upon bivalves and dead mollusks.  Attains 1.3 inches, 30 mm.  Red Sea to Hawaii and the Tuamotus.  Formerly known as Morula granulata and Tenguella granulata.