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Family Spondylidae

HAWAII

Spondylus gloriosus 

South Shore, Oahu, 90 feet

West Shore, Oahu, 75 feet

 GLORIOUS or CAT'S-TONGUE SPINY OYSTER

Rare on walls & cavern ceilings in deep water.  Spines long and narrow, yellow, orange, or wine.  Attains 4 inches.  Endemic to Hawaii.  Spondylus linguaefelis is a synonym.