Workers on board the Taiwanese long line fishing vessel 'Sheng Chi Hui No. 7' throw a juvenile silky shark back into the sea as they realize that they are being observed by Greenpeace activists and Palau law enforcement officials from a helicopter, at sea in the Exclusive Economic Zone (EEZ) of the Pacific island nation of Palau, 08 December 2011. The boat is suspected to have been shark finning contravening Palauan law, whose waters were established as a shark sanctuary in 2009. The Greenpeace ship 'MY Esperanza' is on a three month expedition to expose and stop destructive fishing practices, and to protect dwindling fish stocks in the Pacific.