Surfers will paddle faster if they spread their fingers optimally.
Paddling faster is a competitive advantage. You'll catch more and better waves. There are several paddling tips and techniques to get your surfboard moving faster.
Interestingly, the ultimate paddling/swimming secret is in the fingers of our hands. Scientists from the University of Toulouse (France), Duke University (USA), and the University of Pretoria (South Africa) have contradicted common sense.