Abstract: A fin assembly for a board includes a fixing element adapted to be embedded into a lower surface of the board and a fin. The fixing element includes a cavity, at least one projection extending upwardly in the cavity from the fixing element and towards an opening of the cavity, and a fixing member received by the fixing element and engageable with the projection. The fin has a formation projecting from an end surface of the fin and adapted to be received within the cavity. The formation includes a free end and at least one recessed portion located between the free end and the end surface of the fin. When the fixing formation is received within the fixing cavity, the fixing member may urge the projection against the recessed portion to thereby secure the fin to the board.