These dolphin facts can surprise you greatly!
Dolphins are amazing animals. Playful, sociable and well, very smart, they are also known for having come to the rescue of people more than once, saving drowning people. Every year on July 23, the world even celebrates the day of whales and dolphins. Today is a wonderful day to learn a little more about these amazing creatures.
- In total, 44 species of dolphins were recorded. At the same time, 5 of them, no matter how strange it may sound, live in fresh rivers. They are all very different and are completely different from each other. For example, the killer whale, the largest species of dolphins, reaches 9 meters in length, which is 10 times longer than the length of the smallest representative of the species.
In the photo: killer whale. Photo: google.com
- Studying the structure of their fins, scientists have found that it is similar to the structure of the legs and fingers. This may mean that once dolphins lived on land, like other mammals, and later changed their place of residence to the seas and oceans.
- In the desert city of Petra in Jordan, dolphin drawings were found. Petra is an ancient city founded in 312 BC. This means that dolphins were observed by humans in ancient times.
- The gestational age of a female dolphin is from 9 to 17 months. Each of them gives life to an average one baby, which, unlike all other animals, is born tail-to-face. This is necessary so that the dolphin does not drown. For several years, the baby is defenseless and needs a mother. But even after that, she can stay with her mother for years until she starts her own dolphins.
- Dolphins breathe only through the spiracle, and the breath itself is completely controlled by the animal, unlike most other mammals in which the breath is reflective.
- Only one tablespoon of water that has fallen into the lungs of a dolphin is capable of drowning it (for humans, this amount of water is two tablespoons).
- Dolphins see through sound using echolocation. They emit characteristic clicks that travel considerable distances and are reflected from objects, letting the animal know where the object is, what shape it is and whether it moves. This helps not only to avoid obstacles and predators, but also during the hunt for fish or squid.
- During sleep in these mammals, one hemisphere always remains active, controlling respiration and monitoring possible dangers. Each hemisphere sleeps for 15-20 minutes several times a day.
In the photo: dolphin. Photo: google.com
- It is believed that once dolphins were much smaller in size. The echolocation skill also, perhaps, did not manifest itself at all immediately, becoming the result of a long evolution.
- 100 sharp teeth are not used by dolphins to chew food. They capture their prey, which is swallowed whole. Moreover, they basically have no chewing muscles.
- In ancient Greek civilization, dolphins were considered sacred animals and their killing was punishable by death.
- Scientists suggest that dolphins call each other by name. Each of them uses a certain tone of whistle and will definitely recognize both his own whistle and relatives. And sometimes females even communicate with dolphins before they are born.
- The top layer of the skin of these mammals is renewed every 2 hours. That is why they are so smooth to the touch. Scientists believe that this is necessary in order to reduce friction when moving through water.
- Despite all the friendliness of dolphins, sometimes they work for the military. The US Navy, for example, used them in military conflicts in Vietnam and the Persian Gulf. Now these animals are trained to search for underwater mines and guard nuclear arsenals.
- Dolphins live in groups of tens to hundreds of individuals. The largest "super-flocks" can number more than a thousand animals. But this phenomenon usually does not last long and is observed in parts of the ocean, where there is a lot of food. Gathering in a flock, dolphins work together, hunting, avoiding predators and helping sick relatives.
In the photo: pink dolphin. Photo: google.com
- Dolphin lifespan varies greatly by species. Usually, in the wild, it is tens of years. However, individuals living in aquariums live a much shorter life - up to only a few years. That is why the story of the oldest dolphin outside the wild is so unusual. Nellie was born in 1953 in the United States and lived until 2014.