#自然上头条 #
"It started a long, long time ago.
At that time, we were still a group of carefree boys, laughing and playing every day, basketball, football and table tennis. Suddenly one day Xiao Hei said that he was sick and couldn't play with us, and then Xiao Ming next door also said that he couldn't play with me.
Today, I finally know why! Because......
We all turned into girls! Shhhhhhhhhhhhh ”
Boys suddenly one day become girls? This is not a nonsense. This amazing species is the Arctic shrimp.
Arctic sweet shrimp sashimi
Arctic sweet shrimp
Arctic shrimp, scientific name northern long-fronted shrimp. You must have seen it, the Arctic sweet shrimp sashimi in the Japanese material is it, and it is also called ice shrimp here in the north of China. Arctic shrimp must be produced in the Arctic! In fact, Arctic shrimp are also widely distributed, mainly living in the Arctic Ocean, the North Atlantic Ocean, the Norwegian Sea and the Baltic Sea. It loves cold water and is a pure wild cold water shrimp eight times as serious.
Compared with other shrimp, Arctic shrimp are rich in nutrients, luscious in flesh, growing in pure deep seas, pollution-free, non-parasites, and very serious, very popular.
So how can it be denatural? In fact, Arctic shrimp are hermaphrodite. When they were young, they were all male shrimp, and when they reached the age of four or five, their bodies changed. Since then, the Arctic shrimp has been a full-fledged female shrimp, and the burden of giving birth to a small Arctic shrimp has fallen on its head.
Shrimp seeds
Really on the head. Because the organs of arctic shrimp: ovaries, stomach, etc. are grown on the head. So we'll eat cooked shrimp heads with orange-red seeds (shrimp paste) that are actually eggs from Arctic shrimp that have matured but not yet been released from their ovaries. Therefore, at this time, the Arctic shrimp is more nutritious, the taste is sweeter, and the price is the highest. Over time, arctic shrimp continue to develop, and the eggs on the head are slowly absorbed and transferred to the abdomen. The seeds in the abdomen are the spermed eggs of Arctic shrimp, which are blue in color and orange-red shrimp seeds when cooked. So don't worry when eating Japanese sweet shrimp sashimi, the blue seeds are normal colors, not dyed.
Arctic shrimp, dare to call the Arctic sweet shrimp, naturally has its own uniqueness. Its sweetness comes from the ultra-active biological enzymes that come with it. Arctic shrimp have been living in cold sea water with very low temperature, when people use nets to catch them rapidly, the enzymes in the arctic shrimp body will begin to move, decompose cells, break down proteins, decompose proteins into amino acids, convert glycosides into glucose molecules, and release the sweetness of shrimp; the flesh of the arctic shrimp also begins to be water-soluble because of decomposition. Thus making the Arctic shrimp soft and sticky, luscious and moving.
Arctic shrimp sushi
Yellow eel
"Who can have me miserable!"
Brothers changing wives can also be said to be a beautiful thing, but wives becoming brothers is... Well...... The mourning has changed.
This unlucky big brother is the yellow eel.
Yellow eel, also known as eel. The head is rounded and pointed, looks like a snake, the body length can grow up to 1 meter long, and this brother is also a carnivore, often taking advantage of the big night when people rest to come out to hunt, insects, frogs, small fish are its targets. The whole body is lubricated with mucus, no scales, no gills, and breathes through the mouth and skin. The breathing skin makes the yellow eel meat tender and delicious, replenishing blood and strengthening the body. Although the yellow eel is so delicious and nutritious, it is not so easy to catch it, and it usually likes to be a "cat" in a hole in the muddy bottom of the rice field, stream, river and so on, and it is not easy to go out during the day. And it looks like dirt, yellow-brown with some black patches.
Don't look at the ugly people, everyone is born with the pearl in the palm of the family, and is the most lovely female doll. Until one day, the little yellow eel found that his mother was missing, and his father was mixed with a strange shudder all day long. Where's Mom? Dad deserves to tell the truth, and the strange shu is your mother!
surprise!
It turns out that yellow eels will become denatural after giving birth to small yellow eels. The newborn yellow eel develops its ovaries first on its growth path, and the development of the sperm nest is inhibited. When the yellow eel grows to the first sexual maturity, it has no choice but to be a female yellow eel, and then encounters a yellow eel that has become a male, and "marries and has children" with it. After the yellow eel lays eggs, its previously mature ovaries begin to gradually shrink, and at the same time, the male reproductive glands begin to gradually develop into a sperm nest, at this time, it is the "hermaphrodite period". Therefore, the yellow eel must go through the step of being a mother to become a real "man".
Boiled yellow eel?
Sexual reversal phenomenon
Although the encounter of the yellow eel is "tragic", it is actually a very natural phenomenon, which is the "sexual reversal phenomenon" of the organism.
Sexual reversal phenomenon: Under certain conditions, the phenomenon of mutual transformation of male and female individuals in animals is called sexual reversal, and the phenomenon of sexual reversal is mostly fish. The yellow eel is only one of the most famous.
Anemone fish
In ancient China, there was a "muji sichen", it can be said that in the case of one-sided gender, the animal itself will also make adjustments. Take, for example, red snapper. The red snapper family is very large, with 20 members, but there is only one fish emperor - male fish, and the others are three palaces and six courtyards. When the "emperor dies" or is taken captive, these "fish concubines" will elect one of the strongest and largest females to "inherit the throne". This female fish will also be wonderfully transformed into a male.
The anemone fish (clownfish) is the opposite, it is a "matrilineal clan", the female fish dies, and the male will transform into a woman within 2 months, responsible for spawning.
There are also yellow snapper, curved lip fish, semi-slippery tongue fish, black snapper, fairy fish, and longhead fish, which also have this wonderful and interesting phenomenon of sexual transformation.