Since the same phenomenon happens in the water, NASA scientists found a way to reduce this problem by studying shark skin. Sharks are able to glide smoothly through the water. Microscopic studies of shark skin shows “V” grooves called riblets. By adding the riblets to test models of aircraft in a laboratory, a 10% reduction in skin friction drag was accomplished. Applying this principle to the “skin” of an aircraft can reduce drag and help to save energy.
So the Master Designer gave sharks a special feature to reduce friction in the water. It is interesting how much we can learn by observing design in creation.