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Aquatic animal

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Before entering fully to define the term aquatic animal, we will proceed to determine its etymological origin. In doing so we discover that the two words that shape it emanate from Latin:
• Animal, comes from "animal" that can be translated as any person who has breathing.
• Aquatic, meanwhile, derives from “aquaticus”. An east term that is composed of two clearly differentiated parts: the noun "aqua", which is synonymous with "water", and the suffix "-tico", which is used to indicate "relative to".

The animals are those living beings that are part of the kingdom Animals , can mobilize on their own, reproduce sexually, absorb oxygen when breathing and eat food. The concept, in its broadest sense, includes the Homo sapiens although, generally, the use of the term is limited to non-rational animals .

Water , on the other hand, is an adjective that refers to what is linked to the Water . The word is often used with reference to those beings that live in it or to objects that, by their nature, remain in the water constantly.

The aquatic animals , therefore, are those living beings belonging to the Animalia Kingdom what happens most of its subsistence in water . This does not mean, however, that they are only animals capable of breathing underwater, but that there are aquatic animals that must appear on the surface to capture the oxygen .

Although there are many different types of aquatic animals, it is important to know that they all have a number of common characteristics such as these that we show below:
• They have had to adapt to the sea, specifically their tides and the different water currents that occur. Hence, some have fins, other basal discs, some have shells ...
• No less important is that the feeding of these living beings, in one way or another, depends on phytoplankton, which is a species of plant that lives in the sea and is microscopic. And it is located in the nutritional base of these animals.
• It should also be noted that they have also had to adapt to water temperatures so each class has some mechanisms that achieve this: scales, pale blood ...

The fishes They are the most representative example of aquatic animals. These vertebrates they have gills to breathe underwater, so they do not need to get out of the water: in fact, when they are removed from their environment, they die. The fish have fins for swimming and usually present the body covered with scales.

Other aquatic animals, on the other hand, must rise to the surface to breathe. That is the case of Dolphin , a mammal It has a single spiracle to absorb oxygen from the air.

It is important to note that there are aquatic animals that also spend a good amount of time on the land , so they are usually classified as semi-aquatic. The beavers and the hippos , for example, are in this group.

It is necessary to take into account that within the group of aquatic animals there are several that are in danger of extinction, such as the Mediterranean monk seal, the sea otter, the gray whale or the Napoleon fish, among others.

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