Deep beneath the waves there’s a source of power quite unlike any other. To tap into it, Japanese engineers have constructed a true leviathan, a beast capable of withstanding the strongest of ocean currents to transform its flow into a virtually limitless supply of electricity.

From Science Alert:
https://www.sciencealert.com/japan-s-dropping-a-kaiju-sized-turbine-into-the-ocean-to-fish-for-limitless-energy#l48x4lnkdamc3jz2n06