a strange name of living fossils is Coelacanth,


December 23, 1936. Indian Ocean. Some local fishing boats have gathered at the mouth of the Chaluman River (now Tyalonka) on the east coast of South Africa. Many of them hunt sharks. Suddenly a new kind of fish was seen in a net. The blue fish is about 5 feet long. Weight is around 80 kg. Fish fins are not like ordinary fish. It looks like a sack that encloses with a drawstring.

When was Koelakantha first known?


The ship’s captain, Hendrik Gussen, was surprised to see the fish. Gusen has been fishing for a long time. He had never seen such a fish. He took the fish to the ship, washed it and cleaned it. Now it is their turn to be more surprised. They thought the fish was burning occasionally.

Gusen reported the matter to the curator of the local museum without much thought. Name Marjorie Courtney Latimer. This gentlewoman has already told the local fishermen to inform her whenever she sees any unfamiliar or new type of fish. He will buy fish at a higher price than the local market.

Mrs. Latimer came, when he saw the new fish, the fish of Unkora species seem to him. Bought the fish and took him to the museum. She read many books about fish from childhood. But this fish could not find any identity.

Meanwhile, the fish is also afraid of being destroyed. Then there was no refrigerator in their museum. Mrs. Lateaima went to Mrs. Latimer morgue to keep the fish. But the morgue people do not agree to keep a fish instead of humans. Back to be forced to take a taxdemist. TaxiDarmi is taking a special tactics in a special tactics using a dead animal skin. However, the news of the new fish came to see the chairman of the museum. He said, it’s a common cod fish. Is it so short? But Latimar’s cod really knows the fish. He kept the fish taxidermy and saved the fibers. This is a lot of relaxation Mrs. Latimer.

Latimer contacted James Smith, a fisheries scientist at the University of Rhode Island, to find out more about the fish. Sent a sketch of raw hand drawn fish. He also sent some fish scales.

Unfortunately, Smith was on vacation at the time.  This fish became extinct about six and a half crore (actually 68 million) years ago.

It is not supposed to exist in the world now. He examined the fibers. This fiber is similar to the extinct fish. So is there any way the fish is still on earth? Smith hurriedly wrote a letter to Latimer. He wants to go to the museum and see the preserved fish with his own eyes. Before leaving, he read a lot about fish. Especially with extinct fish.

February 18, 1939. James Smith arrives at the East London Museum in South Africa. He saw the fish saved by Latimer with his own eyes. He was so surprised that he stopped breathing. In fact, it is the fish that was lost six and a half crore years ago. Its name is Coelacanth,. One hundred and one years ago, the fossil of this fish was found by the American scientist Louis Agassiz. He named the fish Coelacanth. Coelacanth is now known as living fossil.

If you want to understand living fossils, you must first know what are fossils? The word ashma means stone. So in simple terms, fossil refers to a body or body part transformed into stone. It may seem, how the body is turned to stone again? The bodies of animals that existed thousands or billions of years ago have been buried in the ground for various reasons. Due to water or wind, silt layer has accumulated on the silt. As a result, they have turned to stone at one time due to internal pressure and heat.

What is meant by living fossils?

Millions of years ago an animal might have come to the river to drink water. The impression of the animal remains on the soft ground. Silt has accumulated on that footprint. As a result, it has turned into stone with imprint. The impression was not lost at all.

In the same way the whole body of an animal or plant or any part of the body turns to stone. It may be that the body of the animal has been destroyed, but the soil around it has turned to stone, leaving an almost imprint. These are fossils. But what about living fossils again? So is there still life in any of the creatures that have been stoned in the past? No. That is not even possible. Living fossils mean that an animal is still the way it was billions of years ago. No new features added. Or the animal is not finished at all. The same may be the case with Coelacanth.

James Smith declared the fish to be Coelacanth. But only the skin and the head of the fish in Latimer’s collection are real. Everything inside is fake. Smith did not mind. So he announced that if a fisherman could catch this fish, he would be given a reward of 100 pounds. He wrote about the prize with pictures of fish and advertised in various newspapers.

After nearly four months of hard work, Smith published a research paper on Silakantha. He made no mistake in honoring Mrs. Latimer. The scientific name of Coelacanth is Latimeria chalumnae (Latimeria chalumnae) after the names of the rivers Latimer and Chalumane.

December 1952. About 11 years later, a fisherman on the African island of Comoro caught a 37-kilogram silakantha. But he did not know the reward. Exceeded the scales of the fish. At that time, a teacher informed the fisherman about the award. The jailer contacted Smith with great difficulty. The fish was delivered to Smith using formalin. This is not the end. Even after that the fishermen caught Coelacanthin 1975 and 1984. 1998.

Mark Ardman, a young biologist from the University of California, has gone on a honeymoon to the island of Menado Tuya in Indonesia. One morning he went to visit the local fish market with his wife. Mark was shocked to see a fish there. A fish like Coelacanth has been hung in the shop. When asked by the trader, he could not name the fish.

Mark took some pictures of the fish and spread them on the internet. That picture caught the eye of two Coelacanth researchers at Guelph University in Canada. They told many research marks that it is also a Coelacanth fish. However, the former is not of the Latimaria species. This is a new species of Coelacanth. The new Coelacanth is scientifically named after Menado Tuya Island, Latimeria menadoensis.

What does the Coelacanth look like?


So far these two types of Coelacanthfish have been found in the world. They are about 6.8 feet in length. Fish weighing 90 kg live for more than sixty years. Coelacanth has eight fins. These include two breast fins, two class fins, two surface fins, one anal fins and one tail fins.

However, the fins are not like ordinary fish. If you look at their fins, you will think that some flesh has come out from inside the body. Finger-like fins protrude around the flesh. In the language of science, this kind of fleshy fins is called lobed fin. Coelacanth is a very lazy animal. They sit quietly in one place for prey.

He catches the prey as soon as it comes close. In addition, due to their fleshy fins, they can move with the soil under the sea. The result is an advantage in catching prey. Silakantha’s face is small but his eyes are big. The female Coelacanthis usually larger in size than the male. Scientists estimate that there are still about five hundred Coelacanthon Earth. In 2013, Chris Amemia and Neil Subin’s team sequenced the genome of Coelacanth. They have published a research paper in this regard in Nature. So far, Coelacanth has been found in Kenya, South Africa, Madagascar, Indonesia, Tanzania, Mozambique and the Comoros in Africa.

The biggest mystery about Coelacanthyet, how do they survive for so many millions of years without changing themselves? So where is the primitive environment of the sea? Or is Coelacantha fish between amphibians and aquatic animals? To get answers to all these questions, more research needs to be done on Coelacanth. The South African government expressed interest in the matter. In 2011, Coelacanth budgeted ten million dollars for research and housing. Other countries should also come forward in Coelacanth research. Only then can this living fossil be saved.

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“ডিমেনশিয়া” যার কারণে আমরা অতীতের চেয়ে সাম্প্রতিক ঘটনাগুলো ভুলে যেতে শুরু করি


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