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Family Mytilidae

HAWAII

Septifer cumingii

Mokapu, Oahu, 130 feet

CUMING'S MUSSEL

Common under stones or in algal mat to 100 feet.  Slipper shaped, green, yellow, red, or brown.  Shell covered by thin hairy periostracum.  Attains 3/4 inch.  Hawaii & the Marshall Islands.  Formerly known as Septifer bryanae.