This assembly kit creates a manta ray which swims forward thanks to the movement of a large fin-shaped piece. Powered via crank by an underwater gearbox, the movement of the soft resin sheet fin makes for a swimming motion that looks just like a real manta ray! Changing the tail angle allows the model to turn in a circle, letting you play in smaller areas. This easy-to-assemble kit includes underwater gearbox, fin and tail float parts. Requires one AAA battery (not included).