The Nautilus is one of the most incredible creatures. Living at depths of over 500 or even 1000 feet, the only way to see it in the wild is to arrange with one of the dive companies who will go out the night before and set traps. They are then brought up so that divers can interact with them, before being set free to go back to the deep. Apparently it does not hurt them. These things have not changed much and are still so prehistoric looking. You could watch them for hours and never get bored. Just one of the amazing things to see if you ever decide to visit Palau