Ship is a fish unlike others

The species of sturgeon fishes counts more than a dozenrepresentatives. However, one of the most amazing is the fish spike. After all, if you believe the research of scientists, then this marine creature appeared due to the union of other species. So, in the gene pool of the thorn traces of sturgeon, beluga, and stellate sturgeon are traced.

So let's plunge into the wonderful worldnature and talk about what other secrets are hidden by a fish spike. We will find out how it looks, where it lives and what it feeds on. And also try to understand why she was on the verge of extinction today.

Fish spike: description

Adult individuals can reach two meters inlength. But most representatives of this species are much smaller. The body itself is oblong, with pronounced, conical spines on the back. Strictly speaking, it was thanks to them that this fish got its name.

The spike differs markedly from its nearestrelatives. For example, unlike other representatives of sturgeons, it has fringed antennae attached to the lower lip. This spiny physiological feature was obtained from its ancestors, who had common roots with sterlet.

As for the color gamut, it ranges fromLight gray to greenish shade. But the belly of the fish is light, almost white in color. In addition, the spine is covered with star-shaped scales that can easily be seen along the entire body.

Areal

So, where does the spike live? Fish feels equally good both in salty and fresh water. Therefore, its range extends for many kilometers, which is incredibly surprising to many scientists.

Thus, representatives of this species can be found inCaspian, Aral, Azov and Black Sea, as well as in the basins of those rivers that adjoin these water bodies. In particular, large populations of spines are found in the Urals, Kura and Sefidrud.

Spike - fish is a longevity

The life path of this fish begins in fresh waters. Therefore, with the advent of spring, adults begin to migrate upstream to reach their spawning grounds. Here they lay eggs, then return back to the sea.

Soon from the eggs appear fry. It should be noted that the young does not hurry to leave its native waters. A year will pass, and only then they will go to salt water, incidentally gaining strength for life on the high seas. Many spines will live for a long time at the mouth of the river, since it is not easy to cross the last line for them.

As for the life cycle, the spike is a fishlong-liver. On average, representatives of this species live on the order of 20-22 years. However, science knows cases when these fish survived to thirty years, which is a good indicator for the inhabitants of the underwater kingdom.

Fish habits

Many consider the spike to be an unwieldy fish, but thisNot certainly in that way. In truth, this being simply does not like to do unnecessary movements and because of this prefers to lead a quiet lifestyle. However, this does not mean that the spike is quiet and harmless. For example, in hunting, he reacts incredibly quickly, without giving the victim the slightest chance of escaping.

Red Book

The spike is a fish listed in the Red Book of Russia. It so happened that at the beginning of the 20th century its catch was allowed, which greatly reduced the population of this species. So, by 1980, its numbers declined by almost 80%, which worried scientists and conservationists. Therefore, in 1983, a special decree was issued, according to which the spike was included in the Red Book. Alas, these measures failed to correct the current state of affairs.

Even today the fish spike is on the vergeextinction. The blame for all that the thorn reaches sexual maturity only by the twelfth year of his life. And because of this, many individuals die much earlier than the first offspring will be able to produce.