⒈ Jellyfish is a very beautiful aquatic animal. It has no spine, but its body is very large, mainly by the buoyancy of water to support its huge body.

Jellyfish body shape like a transparent umbrella, umbrella body diameter is large and small, large jellyfish umbrella body diameter up to 2 meters. From the edge of the umbrella body to grow some baleen-like strip, this strip is called tentacles, tentacles can be as long as 20 meters to 30 meters, equivalent to the length of a large whale. Jellyfish floating in the water, stretching out long tentacles in all directions, some jellyfish umbrella body also has a variety of color patterns. In the blue ocean, these swimming colorful jellyfish look very beautiful.

Jellyfish predate the dinosaurs, dating back 650 million years. At present, the world has found about 200 species of jellyfish, China's common about eight species, namely, sea moon jellyfish, white haze jellyfish, jellyfish, mouth crown jellyfish and so on.

The tentacles of jellyfish are covered with stinging cells, like a small bean stuck to the tentacles. These stinging cells can shoot out poisonous filaments, and when they encounter "enemies" or prey, they will shoot out poisonous filaments to scare the "enemies" away or poison them to death. Jellyfish tentacles in the middle of the thin handle on a small ball, there is a small "hearing stone", which is the jellyfish "ears". Scientists have experimented with simulating the jellyfish's acoustic organ and found that they could detect an ocean storm 15 hours before it arrived.

Don't look at the jellyfish in the water is very beautiful, at ease, but without water it simply can not survive. Jellyfish body water content of 98%, it eating, digestion, excretion must be completed in the water. Without water, the jellyfish body will become smaller and become very ugly.