Goliath Robo Fish with Two Corals and Castle Playset This set includes one (1) Robo Fish and 2 plastic corals and a castle to decorate your Robo Fish environment Water activated swim sensors Comes loaded with 2 LR44 batteries plus 2 bonus LR44 batteries The Robo Fish approximately 3 inches long Swims like a real fish, lifelike tail fin motion