Eric Rolfe, costumed as “Eel-vis Presley” strums on a fake guitar during the Lower Keys Underwater Music Festival Saturday, July 9, 2011, in the Florida Keys National Marine Sanctuary near Big Pine Key, Fla. More than 500 divers and snorkelers participated in the subsea concert made possible by a local radio station’s four-hour broadcast piped beneath the sea. FOR EDITORIAL USE ONLY (Bob Care/Florida Keys News Bureau/HO)