What makes a shark swim so fast?

Answer 1

Not all sharks swim fast.

The Greenland shark, the Pacific sleeper shark, even the Whale shark are slow swimmers.

On the other side of the scale, the Shortfin Mako shark is the fastest swimmer of all sharks.

Some scientists even suggest that the Shortfin Mako can swim up to 100 km/h, although 50 km/h, with bursts of up to 74 Km/h were recorded, and accepted by marine biologists, for this Mako species.

The reasons for high speed swimming capability of some sharks are many.

The highly hydrodynamic body shape, the temperature of the waters, the feeding habits (to attack and eat fast preys, as well as to escape fast predators), the water pressure of deep-sea habitats, among many other reasons, all determine the swimming speed a shark can achieve.

Waiting for a more exaustive answer to your question, from someone who knows a lot more about sharks that I do, here is my contribution.

Post script:

I almost forgot to mention the very particular texture of shark's skin, which has been used for industrial design of fast vehicules (fighter airplanes, speed record racing cars, and many other applications.)

Answer 2

yes because they have gills and a tail and also fins

Answer 3

the shark has fins and gills so it can move faster because a shark fin is very strong so can push water out of the way quickere than a tiger.

Answer 4

In a streamlined shape

Answer 5

Blue sharks