A buoy assembly for use in water activities includes a shell that defines an interior space. The interior space is substantially empty so that the shell is buoyant. A net is positioned around and coupled to the shell. Each of opposing ends of a line is coupled to the net. A fastener, which is slidably coupled to the line, defines a wrist loop that is positioned distal from the shell. The fastener is selectively fixedly couplable to the line so that the fastener is positioned to be selectively slid on the line toward a wrist of user that is positioned in the wrist loop. The fastener is positioned to fixedly couple to the line to couple the shell to the user.