1. People who live on huts above the water over a coral reef connected to the island. They fear the actual island itself, and stepping on it's shores is taboo. Because they live *on* relatively calm waters (perhaps protected by a spit or natural barrier), they function as a great stopover for ships.
2. Crab People, crab people, crab people.... *droning voice*
3. A culture that lives near a huge cliff that's populated by millions of puffins. They believe they can predict the future by watching the birds move, and they are obsesses with this pasttime.
4. Tribal people that worship a volcanic fire god, and line their shores with large stone statues that were built by "the ancients". The people love to surf.