My Deep-sea Fishery

Fang Youqun exerted a little force with his hands, and pinched the biscuit sea urchin.

"I feel that the shell of this thing is not very strong. Why, other than cod, other fish can't bite its shell?" Fang Youqun asked.

"That's not true. There are many creatures with shells in the ocean, and there are many ways to break the shells." Xiang Yang said.

"Brother Yang, didn't you just say that sea urchin biscuits have no natural enemies other than cod?" Fang Youqun asked suspiciously.

Xiang Yang said with a smile: "The reason why biscuit sea urchin has no natural enemies is not how hard its shell is."

The edible part of the biscuit sea urchin is very small, and there is a hard shell on the surface, so in the entire ocean, few marine creatures are interested in the biscuit sea urchin. Even fur seals that love to eat sea urchins do not eat biscuit sea urchins. of.

However, among cod, there is a kind of sturgeon called ocean cod, which sometimes needs to swallow some biscuit sea urchins to help itself digest.

"Speaking of which, the biscuit sea urchin's ability to reproduce is terrifying." Xiang Yang said suddenly.

"oh?"

Everyone became interested in an instant, and looked at Xiang Yang one after another.

Fang Youqun even asked directly: "How terrifying?"

Xiang Yang pondered for a moment, and then said: "During the reproduction period of biscuit sea urchins, female biscuit sea urchins can expel 400 million eggs at a time, while male biscuit sea urchins can release 100 billion sperm at a time."

Hearing this, everyone gasped.

With the biscuit sea urchin's reproduction method, and the biscuit sea urchin has no natural enemies in the ocean, shouldn't the entire sea be occupied by the biscuit sea urchin long ago?

In fact, the normal embryos of biscuit sea urchins can only develop normally after undergoing multiple morphological changes and changes in feeding habits.

Every time the shape changes, a large number of biscuit sea urchins will die. In the end, the ones that survived can be said to be one in a million.

"Okay, this biscuit sea urchin is worthless, throw it back into the sea." Xiang Yang said to everyone with a smile.

Fang Youqun nodded, and according to Xiang Yang's request, he swung his arm vigorously and threw the biscuit sea urchin to the bottom of the sea.

The biscuit sea urchin matter came to an end, and everyone continued to clean up the catch on the deck.

Although the number of catches in this net is not much, Xiang Yang still stands beside the catches, his eyes fixed on the pile of fish, whether it is a rare sea fish or a dangerous sea fish, Xiang Yang can spot it at a glance .

"Damn." Suddenly, a crew member who was squatting on the edge of the fish pile to pick the eagle pomfret exclaimed, and then suddenly jumped up from the spot.

"What's going on?" Xiang Yang asked quickly.

"Captain, there are jellyfish." The crew member said.

Xiang Yang was startled, and quickly said: "Okay, I see, you step back, I'll take a look."

Xiang Yang went to that place and looked down, there was a sky blue strange marine creature that looked a bit like carambola, with a transparent body.

"This jellyfish is beautiful, what kind of jellyfish is it?" Fang Youqun leaned over and asked.

Xiang Yang shook his head speechlessly, stretched out his hand, and grabbed the strange sea creature.

Fang Youqun hurriedly shouted: "Captain, be careful."

"What are you careful about? This thing is called a sea walnut, it's not a jellyfish at all."

The appearance of sea walnut is indeed very similar to jellyfish.

But in fact, the difference between sea walnuts and jellyfish is completely different. Apart from the fact that they are both marine organisms, there is almost no connection between them.

"We were lucky, and even caught a blue sea walnut."

Although sea walnuts are distributed worldwide, the distribution range of some beautiful colors is very limited. Such azure sea walnuts generally only exist in extremely cold waters.

"Is this thing an animal or a plant? It's completely transparent. Why can't I see any internal organs in it?" Fang Youqun asked.

"Sea walnut is a very simple animal. It has no heart, eyes and ears, and no blood or bones in its body." Xia Pengjie answered.

Xiang Yang pondered for a moment, then suddenly said: "Xia Pengjie, your entire answer is not accurate."

"Could it be a plant?" Fang Youqun wondered.

Xiang Yang shook his head, "Of course it can't be a plant, but if you simply say it's an animal, that's not right."

Now, everyone is puzzled.

It's not a plant, nor is it an animal, so what is it?

Xiang Yang said: "There are all kinds of animals and creatures living on the earth now, but hundreds of millions of years ago, there was no life on land, and only a few kinds of creatures lived in the ocean."

Everyone nodded.

Everyone knows this. About five or six billion years ago, there were only a few animals on the earth, such as worms, sponges, and jellyfish.

"After hundreds of millions of years of evolution, the former worms have now evolved into countless branches. Sponge and jellyfish have hardly changed from hundreds of millions of years ago. As for the sea walnut, in fact, in the early years, biologists and natural scientists also made It is not clear whether it is an animal or a plant, so they have a special classification called phytozoan." Xiang Yang said.

From the outside, sea walnuts do look more like plants.

Therefore, biologists use vegetables and fruits to name sea walnuts, and they are called sea walnuts.

However, sea walnut is indeed a kind of animal, and it is also a kind of animal that does not like meat. All kinds of small crustaceans, small fish and shrimps are the food that sea walnut likes to eat. Start with the same kind.

"Captain, can this sea walnut be sold for money?" Fang Youqun asked.

Xiang Yang nodded, "Of course."

Fang Youqun's eyes lit up immediately when he heard the words, "Then is this thing worth money?"

Xiang Yang smiled and shook his head, "I don't know yet."

Fang Youqun immediately became anxious, "Brother Yang, if you're valuable, you're valuable, and if you're not, you're not. How can you not know?"

Xiang Yang pointed to the carambola-like diamond-shaped edges around the body of the sea walnut and said: "These parallel bands distributed on the body of the sea walnut are actually its luminous bands. At night, it can emit light. Very beautiful light, especially as it zigzags through the water with these long tentacles trailing behind it, also giving off a pleasant blue glow like neon."

As soon as Fang Youqun heard it, he immediately understood, "Brother Yang, what do you mean, is this sea walnut really worth money? You have to wait until night to see if the light it emits is good or not?"

Xiang Yang nodded, "Yes, that's right, even the same blue sea walnuts can emit beautiful blue light. At night, the brightness of the light on the tentacles at their tails is different, and the difference caused is the difference between cloud and mud."

Fang Youqun hurriedly said, "Captain, I'll put it in the water tank first."