Samantha Langsdale, costumed as a mermaid, pretends to play a mock musical instrument at the Lower Keys Underwater Music Festival Saturday, July 12, 2014, in the Florida Keys National Marine Sanctuary. The subsea concert at Looe Key Reef, about six miles south of Big Pine Key, Fla., attracted almost 500 divers and snorkelers to listen to a local radio station’s four-hour broadcast piped beneath the sea via underwater speakers. (AP Photo/Florida Keys News Bureau, Bob Care)