Drones are no longer just for the sky. Oh no, my friends, drones like this Gladius underwater drone have entered the sea. And they are smart, too. This specific drone, which recently launched on indiegogo, is a capable of exploring up to 328ft deep with 3 hour runtime. It also has an ultra HD 1080P/4K camera that uses low light adaptable sensors & image quality optimization algorithms for in-water photos and videos. You can control Gladius through a smartphone remote control and omni directional quad thruster system. And the best part? It is the best dollar-for-dollar underwater drone on the market. Buy: $599
\See more of the Gladius Underwater Drone below.