sentence: range and distribution they are not common , but far ranging from coastal , eastern africa ( including the seychelles , and the zanzibar archipelago ) , states with indian ocean coastline , to the pacific ( philippines , cook islands ) , northwards up to taiwan and the ryukyu islands other places reporting pemphis include mainland coastal tanzania , thailand , malaysia ( johore ) , singapore , indonesia ( papua , sumatra , the moluccas , madura and java ) , papua new guinea , hong kong and throughout tropical australia .