Something about wave formation on the surface that it creates extra drag. Moving about under water of course creates drag too but can be less resistant with shape and movement like with SDK where currents roll of the body's surface.
I think most mammals go under water for acceleration, just watch Phelps.
Something about wave formation on the surface that it creates extra drag. Moving about under water of course creates drag too but can be less resistant with shape and movement like with SDK where currents roll of the body's surface.
I think most mammals go under water for acceleration, just watch Phelps.
