Lost: an all-terrain vehicle key on a red foam float, main beach road

Did anyone find a key on a red foam float on the main beach road, Friday afternoon, near where the shuttles stop? It is the key to an all-terrain vehicle, or ATV. A rental company cannot give the vehicle back to its owner without it, and a replacement is a slow, annoying business for a small operator. The float has a cracked corner and a bit of green tape on the ring. I will check this board again on Sunday.