Bump. My other idea is a mashup of PotCaribbean & Into the Blue. A group of divers find themselves in deep trouble with a [s]drug lord[/s] murder mermaid after they come upon the illicit cargo of a [s]sunken airplane[/s] sacred reef. Maybe you have to be mauled to become a merperson? Maybe stealing their trinkets curses you? Maybe neither and there is a shifter in the world we have to find. Currently stocking up on cool pics for the setting.