This article discusses a story about a man named Fish who noticed something unusual about whale flippers and who, after nearly 30 years, turned it into a technology platform. This technology takes its inspiration from the natural design of the bumps, or tubercles, on humpback whale flippers. The 24-foot-diameter fans, based on tubercle technology, use half the number of blades and move 25% more air and consume 25% less power than fans with conventional blades turning at the same speed. After thousands of years of hiding in plain sight, tubercles are emerging as a real, if limited, technology platform. Research has shown tubercles work only on thick, tapered wings operating in a very narrow laminar-to-turbulent transition regime. Whale-inspired fans are already available, and wind and tidal power blades could be the next.