The top speed of a shark varies between the individual species. There are over 400 species of sharks in the world's oceans, but the fastest known species is the shortfin mako and the slowest is the Greenland shark.
The shortfin mako is the fastest shark in the ocean, able to reach a top speed of 31 miles per hour. This shark is also capable of breaching the ocean surface to capture prey, reaching heights of up to 20 feet.
The slowest shark in the ocean is the Greenland shark, able to reach a top speed of 1.7 miles per hour. As the name suggests, the Greenland shark lives in the Arctic Ocean.
The whale shark, the largest shark in the ocean, can reach a top speed of up to one body length per second. With a maximum size of 32.8 feet, the largest whale shark can reach a top speed of 22.4 miles per hour.