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Family Nacellidae

HAWAII

Cellana exarata 

BLACKFOOT LIMPET    'OPIHI MAKA-IA-ULI

Common on basalt from the spray zone to the coralline algae belt of the mid-intertidal.  Close-set ribs with narrower ones between, not extending far beyond shell margin, interior dark gray.  The animal's foot is gray.  Attains 2 inches.  Less popular for consumption as the flesh is soft.  Endemic to Hawaii.