Gray Reef Shark being cleaned by wrasse in current

A seemingly endless parade of sharks patrolling in the current. Fakarava atoll, one of the largest shark sanctuaries in the world, hundreds of sharks swim through a narrow channel called a pass. During the day the sharks are very calm, and mean no harm. They are resting and saving energy. 
 
The Fakarava atoll features such an untouched environment that it has been officially designated a UNESCO biosphere in 2006.