The ZURU Robo Fish activates upon contact with water, using water-activated technology to simulate lifelike swimming movements. Each Robo Fish mimics the appearance and motion of real fish, capable of swimming in five distinct directions. The color-change feature alters the fish's hue when submerged in water. The set includes six unique color variations, allowing collectors to assemble a full Robo Aquarium. The realistic design also lends itself to playful interactions, such as surprising unsuspecting friends with its lifelike behavior.