fish farms

With over 70 percent of the world's natural fisheries taxed beyond the point of replenishment, the demand for farmed fish will only rise in the coming years. Unfortunately, the cramped conditions and shallow locations of most existing fish farms result in low yields and sickly, parasite-ridden fish.

That's where Cliff Goudey, director of the Massachusetts Institute of Technology's Offshore Aquaculture Engineering Center, comes in. He has attached robotic motors to a giant fish cage, allowing it to travel around the sea, rather than stay tethered in shallow water.