My Deep-sea Fishery

The most well-known krill is called Antarctic krill, followed by Pacific krill and beauty krill.

The reason why Antarctic krill is the most well-known is that the number of Antarctic krill is the largest. In the 20th century, when Antarctic scientific research and investigation technology was not so developed, Antarctic krill saved the lives of many researchers.

In the snow-covered Antarctic, Antarctic krill is the only source of food for researchers once they lose supplies.

"Xiang Hui, close the door." Xiang Yang shouted.

Xiang Hui quickly complied and pulled down the iron rolling door of his house.

"Turn off the lights too." Xiang Yang continued.

"Ah? Second brother, what are you doing?" Xiang Hui wondered.

"You'll know when you close it." Xiang Yang said mysteriously.

Xiang Hui turned off the light tube in the hall with question marks all over his head, then turned his head to look at Xiang Yang, "Second brother, the light has been turned off, what are we going to do next!"

Xiang Hui stared fixedly at the fish tank full of krill, to be precise, at the three krill in the tank.

"Second brother, what kind of krill in plain clothes and light colors can glow." Xiang Hui said in shock.

Xiang Yang smiled and said: "That's right, it's indeed krill, now you can open the lights and the door."

Xiang Hui hastily turned on all the lights in the room, then opened the roll and smashed the door.

After finishing all this, Xiang Hui asked again: "Second brother, does this plain-clothed and light-colored krill glow?"

Xiang Yang nodded, "To be precise, of the more than 80 types of krill that have been discovered so far, except for a few deep-sea krill, all the remaining krill, each of which can emit light."

There are special spherical light emitters in the body of krill, and these spherical light emitters are located on the ventral surface of the eyestalk, the thorax and the base of the appendages of the abdomen.

These light-emitting devices throughout the body of krill give krill a beautiful phosphorescence in dark environments, which is how krill gets its name.

After countless experiments, marine biologists have discovered that the phosphorescence emitted by the light emitters in krill is caused by enzymatic chemiluminescent reactions, which is very similar to fireflies, except that the luciferin in krill is produced by Luciferase-activated, because krill cannot produce luciferin themselves and must obtain it from a diet containing dinoflagellates.

It is also worth mentioning that the luminescence of krill is also contrary to the theory of biological evolution.

Because krill do not rely on phosphorescence to prey or attract prey, even if they attract prey, they will usually be killed by the prey, because they are too fragile. After all, the average length of the entire family is only one or two centimeters .

Scientists have different opinions on why krill do not comply with the theory of evolution and emit phosphorescence, and no one can convince anyone.

Some people say that krill emits light to attract females to mate. The effect is somewhat similar to that of a peacock spreading its tail. Obviously, there is an essential difference between the phosphorescence of krill and the opening of peacocks.

Some people say that krill glow is a kind of social activity of krill. This kind of statement is more reliable, but this kind of social activity consumes shrimp after all.

Xiang Yang carefully held the krill in the fish tank. To be honest, it was actually the first time Xiang Yang saw the beautiful krill in plain clothes.

There is a very vertical migratory route of Suyi Pale-coloured Krill, and most of their members will choose to live in this way:

During the day, the Suyi light-colored krill will dive to the deep seabed and bury itself in the sea sand shrimp to sleep.

At night, the plain krill will approach the shallow water surface.

Because Xiang Yang seldom spends time on the bottom of the sea at night, and because the krills in plain clothes and light colors are really small, after burying themselves under the beach, there is no clue on the surface at all, so Xiang Yang has been doing nothing so far. Never seen this kind of krill.

Of course, not all krill choose to be nocturnal.

There are also very rampant and domineering ones in the krill family.

Like Antarctic krill.

Antarctic krill feed and reproduce on the water surface during the day.

The result of this. At least it has made a significant contribution to human scientific research. If it weren't for the existence of Antarctic krill, I don't know how many more scientific researchers would have starved to death during the difficult period of Antarctic supply.

Of course, the Antarctic krill under attack will not sit still.

In the face of heavily armed human researchers, Antarctic krill has nothing to do, but in the face of other marine predators, Antarctic krill has a certain ability to survive.

Under normal circumstances, Antarctic krill uses swimming feet as a driving force to swim forward a few centimeters per second. When in danger, Antarctic krill will quickly move backwards under the push of the telson and tail limbs.

The backward movement speed of Antarctic krill can reach an astonishing 0.8 meters per second, which is dozens or even hundreds of times of the normal movement speed. Ordinary predators simply cannot catch the backward escaped krill.

"Second brother." Xiang Hui squatted down, put his head in front of Xiang Yang, and said with a flattering smile: "How much do you think this plain-clothed and light-colored krill is worth?"

Xiang Yang glanced at Xiang Hui, then shook his head, and said truthfully, "I don't know."

"Ah?" Xiang Hui was surprised: "Second brother, can't you estimate the price of these shrimps?"

Xiang Yang nodded, "The same plain-clothed light-colored krill has a very large price difference. The size, the transparency of the body, and the color of the head all affect the price of this plain-clothed light-colored krill. Condition."

"Even for plain-coated and light-colored krill with the same appearance, their prices are very different, because the life span of krill is very different."

"It is also plain-coated and light-colored krill. The life span of krill living in high latitudes is very long. For example, krill living in the north and south poles can live for nearly ten years, or even more than ten years. The average krill living in mid-latitudes The lifespan is only two years, and krill living in low latitudes usually do not live for one year, and the normal lifespan of krill living in our dimension is only about six to eight months."

Xiang Hui opened his mouth, "In that case, my krills are worthless?"

Xiang Yang nodded, then shook his head again. The main reason why ornamental fish are so valuable is that ornamental fish is an industry. As long as a fish can be sold at a higher price, it is worth buying back regardless of its price. , because this is a commodity that can be profitable.

If every ornamental fish dies in his own hands not long after he buys it, then the ornamental fish will never form an industrial chain. There are too few people who are willing to spend millions of dollars to buy a fish just to make it look good.