Osi Island is an island located in Seram Barat Regency of Maluku Province. Osi Island has about 9 hectares area with a length of about 600 meters and a width of 200 meters. The view of Osi Island beach is very interesting. The water was very clear as we are looking at a giant aquarium. Because of its water is so clear, we could see with the naked eye colorful fish on the sea floor did not miss too starfish are scattered underwater.