I started a shipwreck themed legacy on the Windenberg island. My sim ended up with a mermaid and now his widow and 3 kids are all mermaids! It's starting to get a little tough with just one shower to hydrate them, especially as they are restricted by living off the grid and can't swim in the water around the island. It's fun though. I have decided that the generation 3 children will be allowed to finally explore the rest of Windenburg once they become teens - at the moment nobody is allowed to go anywhere other than the main island or the Bluffs.