In this Tuesday, April 28, 2009 photo, a fisherman family of Bajau tribe is seen on their boat near Kapota island, Wakatobi waters, Southeast Sulawesi, Indonesia. If carbon emissions are not cut by 25 percent to 40 percent by the year 2020, higher ocean temperatures could kill off vast marine ecosystems and half the fish in them, according to the World Wildlife Fund, which warned that 100 million people earning a living off the sea could be forced to leave inundated coastlines and find new jobs. (Irwin Fedriansyah)