Shortfin mako sharks are known as "the peregrine falcons of the shark world." Their torpedo-like bodies and biochemical features make these the fastest of all sharks. Many attain speeds up to 22 miles per hour. One shortfin mako was even clocked swimming at 43 miles per hour. Do we even go to work by car that fast?! These creatures would never be late! To put that into perspective, the fastest known humans run at around 18 miles per hour. And the cheetah, the fastest land animal, for example, can run as fast as 68 to 75 miles per hour.

More Info: en.wikipedia.org