 As a result , many countries in the Pacific region emulated the lead of Puerto Rico and introduced the toad in the 1930s . There are introduced populations in Australia , Florida , Papua New Guinea , the Philippines , the Ogasawara , Ishigaki Island and the Daitō Islands of Japan , most Caribbean islands , Fiji and many other Pacific islands , including Hawaii . Since then , the cane toad has become a pest in many host countries , and poses a serious threat to native animals . 
