Quite the opposite:
- Sharks don’t have fur
- Shark skin is rough is one direction and smooth in the other. This allows them to get friction with the water to drive themselves forward, but the glide through the water for efficient travel.
The idea was copied into competitive swim suits.
https://www.smithsonianmag.com/innovation/shark-skin-inspired-materials-have-a-long-way-to-go-before-they-work-like-the-real-thing-180980973/