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Interesting facts about dolphins

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We found 18 interesting facts about dolphins

Very intelligent and social mammals.

They live in both oceans and rivers. They often travel in large herds, sometimes exceeding 1000 individuals. They have their own language, which we have not yet been able to decipher. Dolphins are very curious and sociable, they also enjoy the company of people.


Dolphins love to sleep.

Since dolphins breathe atmospheric air, they cannot afford to sleep underwater for long periods of time. Therefore, they adapted to aquatic life by taking 15-20 minute naps, during which only one hemisphere of the brain sleeps.

During such sleep, the dolphin can swim, breathe normally and look out for threats.


Dolphins use echolocation.

This is how they find their way in their environment. By making high-frequency sounds, they listen to the echo returning to them and use it to build a “map” of space. They also use echolocation to find food and hunt.

What do dolphins eat?

Dolphins hunt in schools and feed on fish, squid and crustaceans.

The diet varies depending on the species and its habitat. The basis of their menu is fish and squid, which are also a source of water due to its high content in the body of these animals. Since dolphins do not drink, all water comes from their food.


Killer whales are the biggest natural enemies of dolphins.

Although they themselves belong to the dolphin family, this does not stop them from hunting their smaller brothers.

Dolphins communicate both verbally and nonverbally.

They can convey messages by moving their tail, swimming, or adopting certain postures. In addition, they have a rich language consisting of special clicks and high-frequency whistles. They can use sounds to alert each other to danger, show their emotional state, or call young and unruly dolphins to order.

There are about 40 species of dolphins in the world.

Most of them live in shallow ocean waters in the tropical zone.

There are 5 species of dolphins living in the rivers.

For example, the Amazonian inia is a representative of dolphins that live in the waters of the Amazon and Orinoco.

Dolphins are very smart and playful. Their intelligence is equal to that of monkeys, and their brain structure is very similar to that of humans.


Dolphins are very social animals, they form groups of up to a dozen individuals.

Connections in groups are not constant; dolphins move from one group to another from time to time. In conditions of abundant food, groups of dolphins can periodically unite, forming a supergroup, the number of which can exceed a thousand individuals.

Dolphins are very good parents. After the baby is born, they take care of him, and the mother plays with him very willingly and often.

Depending on the species, dolphins do not leave the company of their mother from 3 to 8 years.

They help their comrades.

Dolphins are known for caring for injured and sick people. If necessary, they take wounded colleagues to the surface so they can get some air.

Despite their sensitive nature, dolphins sometimes fight among themselves.

Fights are usually started by females, in the company of whom males fight. During skirmishes, fights and biting occur. In extreme cases, when the fight is very intense and exhausting, the losing male may be excluded from the group.

There are also dolphins in Poland. Our local representative is the porpoise, which lives in the Baltic Sea.

Porpoises grow to approximately 1,5 m in length. They are under strict species protection.

The average lifespan of dolphins is 15 years.

The longest-lived specimen in captivity was Nana, living at Shimoda Aquarium in Japan. This dolphin lived to the ripe old age of 47 years.

Dolphins also suffer from ocean pollution and hunting.

Dolphins' bodies accumulate pesticides, heavy metals, plastics and other industrial and agricultural pollutants that do not readily decompose in the natural environment.

Many dolphins also die from becoming entangled in fishing nets.


Dolphin meat is eaten in some areas of Japan.

They are aggressively hunted and killed with harpoons. Despite the relatively high mercury content in the meat of these mammals, no harmful effects of consuming dolphin meat on human health have yet been discovered.


Dolphins can move at speeds of up to 60 km/h.

To swim, they use the tail and back of the body, which propels the animal. The pectoral fins serve only for steering, while the dorsal fin serves for stabilization.

The smallest dolphin is New Zealand's Tonin, also known as Hector's dolphin.

This endemic species is found in New Zealand around the South Island and west of the North Island. The largest individual measured so far was 150 cm long and weighed 57 kg.
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