Why do dolphins jump out of the water?
It's not just to impress the gallery that the dolphins, these marine mammals appreciated by all, jump out of the water. Dolphins propel themselves constantly by leap over the surface of the sea, simply to move faster. Other species, especially fish, move in the same way as swordfish to flying fish. Admittedly, the smooth and smooth skin of dolphins is hydrodynamic and its particular conformation limits the turbulence caused by their movements in the water. In addition, their skin secretes a lubricating oil that makes it more effective penetration into the water and serves as a shield against the attacks of seawater. Yet, jumping allows a gain in speed and economy of efforts not insignificant, since the resistance of the air is 800 times less than that of water. The dolphins take the opportunity to catch their breath, to take a look around and to amuse the tourists. Whales also jump, but much less efficiently. It is especially to get rid of parasites.
