Yuka from Greenpeace Japan onboard SV Rainbow Warrior during an open boat day aimed at raising public awareness on the plight of the Dugong, Okinawa, Japan. This rare protected sea mammal one of Japan's cultural icons could face extinction if it were to lose it's natural habitat to the construction of a proposed American military air base. Greenpeace is working to protect the last remaining Dugong population in Japan and prevent the destruction of an important marine environment