These are the pair of illuminated robotic fish that provide ambient light in a pool while swimming autonomously. The pair reproduce the exotic characteristics of lionfish with flexible, elongated dorsal and pectoral fin rays and contrasting purple, blue, and orange color bands. Ideal for providing a whimsical diversion at nighttime pool parties, blue LEDs housed in the bulbous eyes and fins provide illumination as each swims just below the water's surface with a reciprocating tail fin. Each requires three AA batteries. 11" L x 3" W x 7 1/2" H. (12 oz.) Set of Two.