What I recommend is: fairy queen jellyfish, sea moon jellyfish, and baixia jellyfish (one more word, which does not meet your requirements).
Sea wasp jellyfish (the most poisonous)
Fairy queen jellyfish
Monk-capped jellyfish (2)
Jellyfish (3)
Lion bristle jellyfish
Jellyfish before Vietnam
Mouth-crowned jellyfish
Sea moon jellyfish
White shrimp jellyfish
Macular jellyfish
Real jellyfish
Facial tingling
Shrimp jellyfish
Hard jellyfish with four-leaf uvula
Jellyfish appeared before dinosaurs, dating back to 650 million years ago. At present, there are about 200 species of jellyfish found in the world, and there are about 8 common species in China, namely jellyfish, jellyfish and jellyfish.
Jellyfish looks like a transparent umbrella. Umbrellas are large and small in diameter, and some have various patterns. The umbrella-shaped body of large jellyfish can reach 2 meters in diameter. In the blue ocean, these swimming jellyfish of different colors are very beautiful.
There are some whisker-like strips on the edge of the umbrella, which are the tentacles of jellyfish. Some tentacles can be as long as 20 ~ 30 meters, which is equivalent to the length of a whale. Jellyfish floating in the water have long tentacles. The tentacles of jellyfish are covered with stinging cells, like small beans stuck to the tentacles. When jellyfish meet "enemies" or prey, the stinging cells will emit poisonous silk to scare off or poison the "enemies". There is a small ball on the thin handle in the middle of the jellyfish tentacles, and there is a small "listening stone" in it, which is the "ear" of the jellyfish. Scientists simulated the sound wave transmission organs of jellyfish and found that the information of ocean storm 15 hours before its arrival could be detected.
Although jellyfish is very beautiful and comfortable in water, it can't live without water. The water content of jellyfish reaches 98%, and its eating, digestion and excretion must be completed in water. Without water, jellyfish's body will become smaller and uglier.
Jellyfish is more dangerous than cobra. A few years ago, the American World Wildlife magazine listed 10 species of the most poisonous animals in the world, and the box jellyfish living in the ocean topped the list. Box jellyfish, also known as sea wasps, mainly live in the coastal waters of northeast Australia. An adult box jellyfish the size of a football is mushroom-shaped and almost transparent. An adult box jellyfish has billions of poison sacs and needles on its tentacles, enough to kill 20 people. The toxicity is obvious. Its venom mainly damages the heart. When the venom of box jellyfish invades the human heart, it will destroy the consistency of the beating rhythm of body cells, thus making the heart unable to supply blood normally and leading to rapid death.
The largest jellyfish is the arctic jellyfish distributed in the northwest Atlantic. 1870, an arctic jellyfish was washed into Massachusetts bay, USA. Its umbrella is 2.28 meters in diameter and its antenna is 36.5 meters long. The smallest jellyfish is only 12 mm long.
When the comb jellyfish swims in the sea, it emits blue light. When it glows, the comb jellyfish becomes a dazzling colored ball; When it swims, the light band swings with the waves, which is very beautiful. At present, biologists in Singapore are conducting an experiment to transplant the luminescent genes of jellyfish to other fish.
Powerful and deadly jellyfish also have natural enemies. There is a kind of turtle that can freely shuttle through jellyfish, and its tentacles can be easily broken with its mouth, so that they can only roll up and down, and finally lose their resistance and become a "good meal" for turtles.