Which science fiction trope did you think would become a reality in 2014? Shark robot certainly wasn't high on my list, but the U.S. Navy's latest creation could have just proved everyone wrong. The Navy's new shark drone is five feet long, nearly 100 pounds and actually about the size of an albacore tuna.
The shark drone can dive to depths of 300 feet, but also works in shallow water. That's because it looks and functions almost identically to how a real shark moves.
It uses its tail to get around and the telltale fin hangs out of the water if the drone is in the shallows. The robo-shark can swim completely independently.
The shark drone could be used for surveillance, intelligence gathering or for mundane tasks like inspecting friendly ships.