Many people have fished, but have you ever seen a fish that can "fish"? And its fishing rod, there is no need to bait! Hello everyone, I am a brother, today we talk about the fisherman in the sea: the squid.
It is a deep-sea fish that lives deep in the sea and is mainly found in tropical and subtropical regions. Its body is very soft, generally 40 to 90 cm long, no scales, covered with brown spots, a large amount of mucus on the skin, plus its large mouth full of fangs and a flat and flat body. Good fellow, this thing looks like that's called a bump.
Maybe the squid thinks so, "Anyway, I don't rely on my appearance to eat, and the seabed is so dark, just grow up."
In terms of swimming ability, the sturgeon can be said to be the "dry duck" in the fish, as a fish it is really unqualified! Its muscles are loose and its size is not small, which makes it quite difficult to swim, so when the sturgeon moves on the seabed, it uses its pectoral fins instead of its legs to crawl on the seabed.
The swimming sturgeon, want to catch up with the flexible small fish and shrimp, that is, do not have to think, so the goods came up with a good idea, it gave itself a "fishing rod".
The type of fishing rod is called more than one, long, short, thick, thin, soft, hard, even if some of the rods look short, can not be used at all, but its elasticity is extremely strong, all at once can play far. Of course, having a fishing rod is not enough, you also have to have "bait".
On the fishing rod of the sturgeon, there is a glowing "small lantern", which is its "bait" to attract small fish nearby. In biology, this "little lantern" is called "pseudo-bait", and it has glandular cells that can secrete photosensits, which are slowly chemically oxidized with oxygen under the catalysis of photonase, and eventually produce light. This "fishing rod" that does not need to be baited is too convenient to use.
The sturgeon is definitely a good hand at fishing, it puts the rod above its big mouth, and once a small fish mistakenly thinks it is plankton and approaches the "little lantern", the sturgeon will immediately open its large mouth and suck them all into its mouth.
But in the dark deep sea, many creatures have phototropism, and the glowing "small lanterns" of the trout will not only attract small fish, but also attract all kinds of ferocious predators.
Therefore, when it is "fishing", it is necessary to maintain a high degree of vigilance, as long as there are fish that look bad, the sturgeon will quickly stuff the "small lantern" into the mouth.
As the light source disappears, it can quickly leave by relying on the dark surrounding environment, and those predators who are attracted will have to leave because they cannot find any trace of the squid in the dark.
As a master fisherman, its mating method is also unique, which is truly unique in nature.
For this strange-looking creature, scientists will certainly not let it go. In the experiment, they found a strange thing. How come these trout are all females? Where did the male squid go?
After careful study, scientists found that the male squid was in the female.
The female and male sizes of the sturgeon are very different, and the average length of the male sturgeon is between 6.2 and 7.3 mm, making it one of the smallest known vertebrates. Females are generally more than ten times the size of males.
The male trout, which grows deep in the sea, spends his life trying to find a female trout. For this reason, some male sturgeon will even evolve their own sense of sight or smell, in order to find a wife is really enough to fight, so for example, those boys think that their girlfriends will have all day, and the little sister thinks about boyfriends all day, are you ashamed?!
The sturgeon does not live in groups, and in the vast ocean, male sturgeon is likely to spend their entire lives unable to find a female. But as soon as the male trout finds the female, it swims under the female's abdomen, turns it upside down, and then opens its mouth to bite the female's abdomen, releasing a digestive enzyme in its mouth.
This digestive enzyme is particularly powerful and can act as a "binder", and the male squid starts from the mouth and slowly merges with the female, and their blood vessels, physiological tissues, and even the circulatory system are also linked.
After that, the body of the male squid will gradually atrophy, the digestive organs, brain, heart and eyes will gradually disappear, and finally only a pair of reproductive glands will be left, at this time the male sturgeon has completely become a part of the female sturgeon body, and the female as a host has become a hermaphrodite.
The most terrifying thing is that scientists have found 8 pairs of male reproductive glands in a female sturgeon, that is, it has fused 8 male sturgeon, and at this point, it is a proper "big turnip". Whenever it wants to mate, 8 pairs of gonads release sperm at the same time, combining with the eggs it releases to form an in vitro conception.
Is it also a hermaphrodite, and a mammoth-growing trout can be eaten? Whether it is long ugly or long weird, many people are concerned about the topic after seeing it: Can this thing be eaten?
Heck, not to mention, this guy can really eat it; not only can he eat it, it's also very tasty, and it's also very nutritious.
The unsaturated fatty acids and lecithin in the body of the trout are important components of brain cells and are of great help to improve memory and immunity.
During the Edo period in Japan, the sturgeon also had the phrase "eat well-being in the east and pufferfish in the west", and at that time, it was the most advanced tribute.
In even Europe and North America, the catfish is known as the "oyster of the poor", and many people are addicted to its delicacy.
But don't the trout live in the dark deep sea? How expensive is it to salvage it from the deep sea, and how did it become an "oyster for the poor"?
Originally, there are many species of sturgeon, and there are more than 250 species of sturgeon known to mankind.
What we usually buy is 50-100 meters deep sturgeon.
Due to the delicious meat and inexpensive price of the sturgeon, it is particularly popular in the market, and coupled with the fact that this guy is slow and easy to catch, the number of sturgeon is decreasing dramatically.
But the living environment of the catfish is doomed to be unable to be artificially farmed at all, and the sturgeon we eat is also wild, if it has been fished endlessly, then the sturgeon will probably face an existential crisis.
Even if the sturgeon looks ugly, but the delicious taste still makes it difficult to escape the poisonous hands of humans, but a large number of fishing is not a long-term solution, only to carry out the protection of the sturgeon, sustainable development, in order to enjoy the delicious sturgeon and protect it at the same time.