Abstract: The invention relates to an accessory for a watercraft, the watercraft including a body including a bow having an end, a stern and two sides, extending between the end of the bow and the stern, including gunwales at an upper edge. The accessory includes a body means adapted to lie substantially along the length of one side, substantially proximal to the gunwales. In use, two accessories are used, so that a body means lies substantially along the length of each side of the watercraft, and the body means are configured so as to provide increased flotation of the watercraft in the water. The invention also relates to an accessory for a watercraft which acts as a fender, reduces splash or spray, or increases lift of the watercraft as it moves through water. The invention also relates to a method of installing an accessory on a watercraft.