An undated file photo, released by Conservation International, shows fishermen apprehended by community patrol holding carcasses of dead sharks caught in Raja Ampat, a declared shark and manta ray ... more 

An undated file photo, released by Conservation International, shows fishermen apprehended by community patrol holding carcasses of dead sharks caught in Raja Ampat, a declared shark and manta ray sanctuary, in West Papua province of Indonesia. Ninety percent of the world's sharks have disappeared over the past 100 years, mostly due to overfishing less