Liquid Robotics is a small company that makes simple ocean-going robots. The company got a mysterious distress call from one of the robots. It was attacked by a shark with about a 12 to 14-inch size bite from the shape of the shark’s fins. Thankfully, after 150,000 combined miles at sea with the company’s robots, this was the only shark attack. The bots are powered by devices that convert wave motion into energy, and can roam the seas for years without needing any fuel.”]
Source: https://gizmodo.com/what-really-happens-when-a-shark-attacks-a-robot-5811927