Swimways Rainbow Reef: Finn Diesel Water Activated SharkYou may think you're safe floating happily in your pool but wait, what's that on the surface? A shark fin? It can't be! Or CAN it?! Shark lovers will flip for this robotic shark that swims above and below the water with realistic movements. It even dives up to 6 feet underwater and changes speeds as it swims, making for an exciting chase! Requires 3 AA batteries, included. From Spin Master, for ages 5+ yrs.