Fluid Earth developed a fin for surfing that increases maneuverability and performance. It is called the Humpback Fin (8" skeg) because it was inspired by the flippers of humpback whales, which have tubercles or bumps on the leading edges. Fluid Earth worked with Dr. Frank Fish, who also developed the tubercle technology used by the WhalePower Corporation for turbines, fans, and pumps.
Frank E. Fish noticed that the leading edge of humpback whale flippers
have tubercles or bumps. This didn't make sense to him because it went
against the normal way of thinking. Through wind-tunnel tests, Fish
realized that the tubercles on the flipper delay the stall angle by
approximately 40%, while increasing lift and decreasing drag.