Gene Roddenberry would have you believe that space is the final frontier. But really, the deep blue sea is more apt for that distinction. And without mega-rich hobbyists to fund exploratory plunges into those uncharted depths, science has had to seek out an alternative, more cost-effective means. Enter the robotic fish. Measuring five feet in length (1.5 meters), lasting up to eight hours and costing about $32,000 (£20,000), these cyborg swimmers are made to boldly
