August 24th, 2013

Underwater world, jellyfish!

But do not be afraid to look at the jellyfish. In fact, they are very beautiful. Whimsical lanterns, chandeliers, saucers and umbrellas with tentacles, all translucent, ephemeral, often painted pale blue, purple, brown and pink colors. Their graceful slow dance in the water fascinating.

From them, and can "petrified". However, not by sight, and by touch. Jellyfish venom paralyzes inadvertently swam up to him fish. But the people of jellyfish gets.

Jellyfish belong to the class of cnidarians. They are arranged simply – a sort of two-layer bag or cap lined. The outer layer of cells is consistent with our skin and an inner layer of cells lining – is the mouth and the stomach. However, the mouth – and not just his mouth, as the remnants of undigested food through it are also deleted.

Most of all, have fun jellyfish stinging cells called. All jellyfish have them. They look like capsules filled with poison. Inside the cell is twisted into a spiral of long hollow thread that sticks out from the outside tiddly sensitive hair. A little touch him, the thread turned inside out of the capsule and stuck in the victim. According to the thread injected poison.

The man for the jellyfish too large prey, and in most cases, is not lethal jellyfish burns, though very unpleasant. However, the larger the jellyfish of the species, the worse the consequences of a meeting with her.

How big are the jellyfish? Very different – from a pinhead to a two-meter giants. Do you want specific numbers?

Is listed in the Guinness Book of jellyfish tsianeya Hairy, caught in the north-west Atlantic in 1865. Her hat was 2.28 meters in diameter and tentacles extended to 36.5 meters. That is, if the tentacles stretched in different directions, the length of a jellyfish is 75 meters. This is the longest animal on Earth!

Tentacles cyan – thousands of thin, sticky crimson-brown strands. Accumulations of jellyfish stinging web form field area tens of thousands of square meters. It is this jellyfish is narrated in the colorful story of Conan Doyle, "The lion's mane." But the story is not quite accurate, kill a man tsianeya hardly capable of.

The farther away from home shores to the south, the more jellyfish in the sea, the more they sting. In the Mediterranean, we can "make happy" jelly-like creatures with such beautiful names as hrizaora, Charybdis, kotiloriza. In 1976, it first appeared glowing jellyfish Pelagia, contact with which can cause not only a searing pain, but also a shock.

Living in the Mediterranean and Physalia – amazing creatures, the main area which is in the warmer southern seas. Frankly, Physalia – this is not a jellyfish. This is a colony of hundreds of jellyfish and polyps, each of which performs a function. Some of them get food, others digest it, others defend the colony from enemies. But apparently it looks like a single organism.

The organism that is very beautiful. Imagine sailing on the sea float size a man's head, painted in iridescent colors of blue and blue to purple and pink. It's tempting to take it in hand. But by that swim bladder are 15-20 meters yadonosnyh tentacles!

Physalia venom is similar in action with cobra venom. Accidental contact with it can cause severe burns, the body is covered with blisters, swelling lymph glands breath. Described and deaths.