What is the smallest shark in the world? Why are sharks afraid of dolphins?

The largest shark in the world is the whale shark, which is 18 meters long and weighs 40,000 kilograms. What is the smallest shark in the world? Why are sharks afraid of dolphins? Let's take a look at the introduction of Encyclopedia Knowledge Network!

Contents of this article

1. The smallest shark in the world

2. Why are sharks afraid of dolphins?

3. How many meters can a shark swim per hour?

The smallest shark in the world

The smallest shark among all shark species is the hardback pygmy shark. The smallest one is only 18cm long, and the average length is about 30cm. It often lives in deep sea areas with a depth of 1200m, so it is generally difficult to find this shark.

Why are sharks afraid of dolphins?

Sharks fear dolphins because they have a powerful sonar system. The dolphin's sonar system has the ability to locate itself and other marine life. It can also interfere with the brain and nervous system of other marine animals, which will reduce the shark's fighting power.

How many meters per hour can a shark swim

Different types of sharks swim at different speeds. The fastest shark in the world is the sharpfin mako shark, which can swim at a speed of more than 56 kilometers per hour. The slowest shark is the Greenland shark, which swims at a speed of only 0.34 meters per second, or about 1.22 kilometers per hour.