2023-11-03 04:45:22
World Jellyfish Day falls on November 3 every year to celebrate creatures that have been on this planet millions of years longer than humans. It is also the center of the mysteries of the sea.
Origins of World Jellyfish Day There may not be a clear origin. But it was expected from a group of marine biologists. that respects the simplicity of these strange but beautiful creatures The largest number of jellyfish are commonly found in the southern hemisphere. In places like Australia and South Africa It is possible that World Jellyfish Day is timed to coincide with spring in the Southern Hemisphere. This is the season when jellyfish begin their migration to the coasts of the Northern Hemisphere.
To celebrate the sea creatures that have lived on this planet for over 500 million years, we would like to introduce you to some of the amazing facts about jellyfish.
1. Jellyfish are not fish. Even though the word fish is in the English name But jellyfish don’t have any characteristics similar to fish. The fish is classified as a group of vertebrates. But jellyfish are invertebrates. Their bodies are transparent and soft. The important thing is that they do not have bones, gills, brains, lungs, hearts, or even blood. The jellyfish’s body is made up mostly of jelly. and contains up to 95% water. The clear and thin skin allows the jellyfish to exchange oxygen directly through the tissues.
2. Jellyfish are the first group of animals. that was born on this earth more than 500 million years ago and existed 230 million years before the dinosaurs. In 2017, archaeologists discovered the oldest jellyfish fossils in Southern California. The jellyfish fossils found are soft fossils. They are one of a group of fossils that are difficult to find. Occurs from the rapid deposition of sediment. Until it blocks the natural decomposition of tissue and leaves only traces imprinted in the stone. Thirteen jellyfish fossils have been discovered. Examination is estimated to be approximately 540 million years old.
3. Worldwide, there are more than 100 species of jellyfish that are poisonous and dangerous to humans. Jellyfish venom is contained in The venom of jellyfish is dangerous, causing itching, rashes, swelling, redness, burns, and burning pain. and may be severe to the point of death. The severity depends on the type of jellyfish and the amount of venom received. The poison can damage the nervous system, skin, and cause heart failure and death. What’s more, even though the jellyfish is dead, Poisonous needles are still effective at harming people who come into contact with them.
4. Jellyfish are living creatures that are very diverse in terms of shape, size, and color. The smallest jellyfish in the world is the Irukandji jellyfish. Its upper body width, which is curved like an umbrella, is only 25 millimeters. The world’s largest jellyfish is the Lion’s mane jellyfish. It has a length of body from the top to the tip of its tentacles. Found to be as long as 37 meters, it is said to be as big as a snake. with the blue whale But in terms of body weight, Nomura’s jellyfish has a weight of approximately 204 kilograms, equivalent to the weight of a piano. There are also jellyfish with beautiful colors such as Flower Hat Jelly, Costa Rican Jellyfish, and jellyfish with strangely cute shapes such as Fried Egg Jellyfish (Fried Egg Jellyfish) Importantly, there are also some jellyfish that glow, such as crystal jellyfish. that has the gene to produce the fluorescent protein Green Fluorescent Protein (GFP) in the body
5. Jellyfish are one of the living things that have been sent to space. On June 5, 1991, NASA sent more than 2,500 lunar jellyfish aboard the Space Shuttle Columbia on STS-40 to study the nervous system. This is because jellyfish have a finely tuned gravity response system for balancing their swimming in different directions.
Source: daysoftheyear and National Science and Technology Development Agency (NSTDA)
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