Theory that ridged skin helps dolphins debunked

A dolphin is obviously not a golf ball. However, many scientists believed that the way one slips through the water and the other through the air owed to the same cause: similarities in surface texture and their effect on drag and locomotion.

source https://www.lifetechnology.com/blogs/life-technology-news-blog/theory-that-ridged-skin-helps-dolphins-debunked