Alex Mustard / A lone Caribbean reef shark (Carcharhinus perezi) cruises over sand ripples. Walkers Cay, Northern Bahama Islands, Republic of Bahamas.

Merryn Thomas / Deenish and Scariff Islands viewed from the Ring of Kerry near Caherdaniel, Republic of Ireland, May 2009.

Roberto Rinaldi / Fishing boat in the clear turquoise waters around the reef, Belize