Walk, don't run..........
"Sharks have been around for a long time, emerging over 400 million years
ago. New research shows that tropical ‘walking sharks’ appeared just 9 million years ago, making them the most recently evolved shark on the planet."
“We found the sharks, which use their fins to ‘walk’ around shallow
reefs, only split off evolutionarily from their nearest common ancestor
about 9 million years ago, and have been actively [spreading] into a
complex of at least nine walking sharks ever since,”