Near the shores of the Black Sea you can meet unusually beautiful and interesting sea inhabitants. Fish, mollusks, rapans and even dolphins.
The most mysterious and very ancient creatures also live there: Medus and Grebneviks. They appeared on our planet several hundred million years ago and since then practically did not undergo any changes.
The bodies of jellyfish are 98% of the water and look like jelly. They are considered animals only due to the fact that they have muscle tissue and digestive system.
The world has a huge number of species of jellyfish. Only two of them live in the Black Sea: Eared Aurelia and Cornerot. As well as Grebneviks similar to them memiopsis and Beroy.
Aurelia
Aurelia or eared aurelia small in size of a jellyfish. Its dome in diameter does not exceed 40 cm. Little tentacles are located along its edge, on which there are stinging cells. With their help, the jellyfish seems to sting small animals, paralyzing them. For a person does not pose a danger.
The body of aurelia has a purple-pink shade and consists of a cavity of the mouth, stomach and intestines. With the help of the mouth of the jellyfish and eats and allocates waste of life. There are four mouth blades around it: long and elongated, like an ears by a hare. In females, these blades are larger, as they contain special cameras in which their larvae grow and develop.
Cornerot
Cornerotes are poisonous representatives of the family of scyphoid. These are rather large jellyfish. The size of their dome is 60-70 cm, and there are individuals whose diameter reaches two or more meters. This detachment is poisonous.
Cornerots, unlike other jellyfish, have no tentacles at the edges of the dome. Their stinging cells are located on the epidermis of the mouth blades. Jellyfish blades have a stomach structure. Because of this, they were called cornerents.
Cornerot can be blue, purple or blue. These animals are very fast and can move in various directions. This is an advantage over other jellyfish that move along or due to minor muscle contractions.
Grebnevik Mnemiopsis
Grebneviks, although they resemble jellyfish externally, belong to a completely different type of living organisms.
Mnemiopsis moves with the help of rowing plates, which are located on the sides and beautifully shimmer in different colors. It is a sea predator feeding on zooplankton, fish larvae and caviar, as well as mollusks.
In the 80s, he was accidentally brought into the waters of the Black and Azov Seas, where he took root and caused the mass disappearance of the local marine fauna. It also spread widely in the Caspian Sea, where he led to a reduction in the number of fish and other inhabitants.
Grebnevik bean
Grebnevik Beroy in the Black Sea was also brought by chance with the ballast waters of ships. This turned out to be a salvation for the local fauna, the existence of which, due to the fault of the mnemiopsis, was threatened. The fact is that the only suitable food for the Grebnevik Beroy turned out to be mnemiopsis. Since then, the number of the latter began to be controlled by a new predator.
Beroy has an oval shape and is only 16 cm in length. It is almost transparent, sometimes has a pale blue or pale pink shade. This crest has a large mouth at one end of the body and a statocist on the other. This body ensures the balance of invertebrates.
Beroy, like other Grebneviks, is able to refract the light in such a way that it shimmers with all the colors of the rainbow.
