A photo from open sources
As you know, whales and dolphins swim all their lives in sea water, never going to land.
However, like any other mammal, these animals must get water for the body from somewhere, otherwise they simply don’t to survive. Seawater is clearly not suitable for this, since it contains a lot of salt. Even if you drink such water, you will need even more fresh water to remove excess salts from the body by the kidneys.
So what then do the cetaceans drink? Scientists say that absolutely nothing. It turns out that marine mammals in During evolution, they forgot how to drink. Instead, they get life-giving moisture by eating plankton, fish and squid that consist of 70-80% water. In addition, they receive water due to the complex process of fat absorption.
A photo from open sources
Sea fish, for example, have in their gills desalination apparatus: salt from their blood is captured by special cells, then in a very concentrated form is displayed along with mucus. Cetaceans, alas, lack such a feature. However, they are hardly ever thirsty.
Among other things, whales and dolphins, unlike land mammals minimized fluid loss. because of a special structure of the kidneys (similar to the structure of desert buds animals) and the absence of sweat glands, cetaceans lose daily much less water (in proportion to its weight) than you and I. Consequently, the need for life-giving moisture below.
However, this leads to certain problems. So, with cetaceans are not able to lower water temperature body temperature through sweating, therefore feel yourself in such conditions is unimportant. For this reason, whales and dolphins try not to approach the equator and swim in the more northern latitudes where water temperature is most comfortable for them.
Water Dolphins Fish
