According to British media reports on August 7, thousands of giant spider crabs invaded Cornwall Beach in the United Kingdom, and suddenly the entire beach was densely packed with headless spider crabs, teeth and claws, and the scene was extremely terrifying.
This extremely rare phenomenon plunged nearby residents and tourists into panic and shock.
These densely packed spider crabs have the iconic long legs and pincer-shaped claws. Their venom, while harmful to prey, is harmless to humans.
So many spider crabs invade the beach, could it be for breeding. But come to think of it, this season is also not the time for them to breed.
It turns out that this year, with the abnormal increase in temperature, seawater is no exception, and the abnormal climate has led to an increase in the temperature of its seawater, and spider crabs will come out to "breathe".
Spider crabs are also divided into many kinds. Probably the long-beaked big-footed crabs that appeared on Cornwall Beach in the United Kingdom this time, they are about one centimeter in diameter and often found along the coast of Europe.
In addition, there is the giant cheet crab that lives in the Pacific Ocean near Japan, the world's largest spider crab, and its two claws are more than 4 meters (13 feet) apart when they are stretched, making it the largest arthropod in the world.
Diamond crabs in the Indian Ocean, camouflaged very much like surrounding corals, are difficult to spot; The isosicle, which lives in the Pacific Ocean near Canada and Mexico, is about 1.25 cm wide and 2.5 cm long, with two colors of green and red on the back and green on the bottom.
These spider crabs have many similar habits, generally living on the seabed at a depth of 3600 meters, but sometimes they will climb to the sand in the shallow sea; Especially during breeding, they will climb to the beach in large groups, and fishermen will take advantage of the opportunity to catch fish.
They like to prey on fish for food, relying on strong and powerful pliers, and once the prey is targeted by them, it is difficult to escape its "clutches".
The venom of the spider crabs that appeared on Cornwall Beach this time is not harmful to people, and they will return to the depths of the ocean after they have shed their shells.
But not all spider crabs are friendly to people, and Japanese spider crabs are called "killer crabs" by locals. What's going on?
"I'm not a spider, I don't spit silk, I've always lived in the depths of the sea, I'm just a crab," is the Japanese spider crab explaining its origin to passers-by who have questioned its identity.
If you count by size, Japanese spider crabs are the pride of the spider crab family, but they do not compete, relying on the advantage of large size, incarnated as "killer crabs".
In Japan, they are not only committing evil on the beach, but also cunningly launching sneak attacks on fishermen who go out to sea to fish.
Speaking of this, you may find it ridiculous, just by its little power, how can it hold humans hostage, this is simply a joke.
But do you know the true face of the "killer crab"? They often win in numbers, quietly approach small boats, take advantage of the lack of preparation, launch a sneak attack, and use powerful claws to catch people and drag them into the water, which sounds really frightening.
The true face of Japan's "killer crab"
The frequent injuries and atrocities committed by "killer crabs" in the Sea of Japan are notorious in Japan, and their "crimes" have long attracted the attention of Japanese marine biologists.
The survey showed that the body width of adult Japanese killer crabs is generally 30 centimeters, but they have long claws, which can be stretched into a round surface with a diameter of 3 meters, and the largest can reach 3.7 meters. It seems a breeze.
In the face of such a terrible "killer crab", it has become a shadow of the locals, and in Japan, they often hurt people.
In July 2007, in the heat of Japan, a couple took their 8-year-old daughter to the beach to escape the heat. Disappointingly, despite being at the beach, it was still very hot at noon, and the family of three could only stay in the hotel at noon, but how could the children stay quietly.
So she kept crying and going to the beach to play, and finally, her arm was unable to reach her thigh, and her parents reluctantly agreed to let her go out to the beach.
So the 8-year-old girl went to the beach alone, and just as the little girl was looking for beautiful conchs by the sea, she was triumphant. What she didn't know was that Death was approaching her.
A pair of giant crabs about 40 centimeters wide are mating and laying eggs on the shallow beach, and the male crab sees that someone is coming to disturb, and it suddenly raises its powerful claws and attacks the little girl.
Although the little girl quickly ran away, she was the opponent of the "killer crab". Soon the little girl was grabbed by the crab's pincers and clutched her leg, blood flowing.
Despite the noise of tourists and fishermen on the side, the bare hands are not able to fight 2 cancer crabs with 8 sharp claws, and the more they fight, the more fierce and fierce the cancer appears. After a fight, many fishermen were injured, so the 8-year-old girl was dragged alive by two cancer crabs into the depths of the sea.
How can a cancer crab with a body width of only 30 centimeters have feet up to 3 meters long?
There are three reasons for this. First, they walk in the depths of the sea all year round, the body is easy to float due to buoyancy, and the feet are in contact with the bottom of the water because of instability; Second, the friction under the water is small, like walking on the ice, it is easy to slip, so its feet are more pointed; Third, the resistance of the body to the flow of water exceeds the friction under the feet.
Marine biologists believe that this huge "killing crab" is evolved from the spider crab, the spider crab is not large, usually living in the deep sea of 3600 meters, and the "killing crab" that people fear today may be affected by deep-sea nuclear waste, mutated, growing in size, and becoming fierce.
Especially during the spawning period, these killer crabs migrate in droves to shallow seas, posing a great threat to fishermen and tourists on the beach.
Today, fishermen along Japan's southeast coast have fled when they see giant spider crabs, and they have not yet found an effective way to deal with this domineering and vicious crab.
Who can blame this? The artificial destruction of the marine environment, human beings can only eat their own bitter fruit.
Fortunately, the large number of spider crabs that invaded Cornwall Beach in the United Kingdom did not attack people. But climate change is causing the sea to heat up abnormally, which is something that humans should be wary of, and if it continues, will other creatures invade humans? What terrible things will happen?
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