Stingrays - waterfowl butterfly

• Ramps - waterfowl butterfly

Ramps, as well as sharks, are among the most ancient fish. They are unique in the fact that when swimming not use the tail, as do other fish. Stingrays move only by fin movements, while recalling butterflies.

Most stingrays live in sea water, but there are a few freshwater species.

For rays characterized by a very "flattened" the body and large pectoral fins fused to the head. Its mouth, nostrils, and five pairs of gills are flat and are usually light underside.

The upper side in the color-rays adapted to one or another living space and can vary from light to black sand.

Stingrays can be found in different parts of our land. They are found even in the Antarctic coasts and in the Arctic Ocean.

rays vary in size from a few centimeters to several meters, and the scope of the "wings" of some rays may be more than 2 meters.

One of the most well-known species of rays is Manta, whose wingspan can reach 2.5 meters, length - up to 5 meters! Stingrays of the family whiptail stingray is also very large and reach 2.1 meters in width and up to 5.5 meters in length. Relatively large ramp-stingray - Marine cat - found in the Azov and Black Seas.

Skates - very ancient fish. They are relatives of sharks, and, next of kin, although foreign similarities and not observed. According to the internal composition of ramps, like sharks, are not made of bone and cartilage of.

In the old days rays were like sharks not only the internal structure, but also the external features. But time has changed them beyond recognition.

Most of the ramps leads demersal lifestyle and eats mollusks and crustaceans.

The ramps have a unique respiratory system. If you take other fish, they breathe with gills. However, if the slope of trying to do the same, it along with the air would be sucked into itself and the sand lying on the bottom. Therefore breathe rays differently. Air enters the body through specific slope spiracle which are on the back. Ibid located and his eyes (seen in the photo).

A particular "weapon" is endowed with electrical detachment rays, which by means of a special body may paralyze muscles converted extraction electric discharges from 60 to 230 volts and more than 30 amperes.

By the way, can produce electricity all skates, but not to the same extent as the electric ray.

The man got up and stingrays. Their skin is very durable and has an unusual texture, however applied in the tanning industry for the production of purses, belts, handbags, briefcases, and so on. N. Wings skates are a delicacy in Portuguese kitchen.