Fang Youqun used his hands to slightly force and broke the biscuit sea urchin's body.
"I feel like the shell of this thing isn't very strong. How come other fish, except cod, can't bite through the shell?" Fang Youqun asked.
"That's not the case. 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 apart from cod, sea urchins have no natural enemies?" Fang Youqun asked puzzledly.
Xiang Yang smiled and said, "The reason why the biscuit sea urchin has no natural enemies is not because its shell is so hard."
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 biscuit sea urchins. Even sea seals, which love to eat sea urchins, do not eat biscuit sea urchins.
However, among cod, there is a sturgeon called the ocean cod, which sometimes needs to swallow some biscuit sea urchins to help its digestion.
"Speaking of which, the reproductive ability of the biscuit sea urchins is very terrifying." Xiang Yang suddenly said.
"oh?"
Everyone instantly became interested and looked at Xiang Yang.
Fang Youqun even asked directly: "How scary is it?"
Xiang Yang pondered for a moment, and then said: "During the reproduction period of biscuit sea urchins, female biscuit sea urchins can excrete 400 million eggs at a time, and male biscuit sea urchins can excrete 100 billion sperm at a time."
Hearing this, everyone took a deep breath.
With the way the biscuit sea urchins reproduce, and the fact that they have no natural enemies in the ocean, shouldn't the entire ocean have been occupied by biscuit sea urchins long ago
In fact, the normal embryo of the pancake sea urchin must undergo many morphological changes and changes in diet before it can develop normally.
Every time the shape changes, a large number of sea urchins will die. In the end, only one in a million can survive.
"Okay, this biscuit sea urchin is worthless, just 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 and threw the biscuit sea urchin to the bottom of the sea.
The matter of the biscuit sea urchin came to an end, and everyone continued to clean up the catch on the deck.
Although the catch in this net was not large, Xiang Yang still stood next to the catch, staring at the pile of fish. No matter whether it was a rare sea fish or a dangerous sea fish, Xiang Yang could spot it at a glance.
"Oh shit." Suddenly, a crew member who was squatting beside the fish pile picking out eagle pomfret exclaimed, and then jumped up from his position.
"What's going on?" Xiang Yang asked hurriedly.
"Captain, there are jellyfish." said the crew member.
Xiang Yang was shocked and said quickly: "Okay, I got it, you step back and I'll take a look."
Xiang Yang walked to that place and looked down. There was a strange sea creature that was sky blue, looked a bit like a star fruit, and was completely transparent.
"This jellyfish is very beautiful. What kind of jellyfish is it?" Fang Youqun came over and asked.
Xiang Yang shook his head speechlessly, then reached out and grabbed the strange marine creature.
Fang Youqun quickly shouted, "Captain, be careful."
"What are you being 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 huge. Apart from being marine creatures, the two have almost no connection.
"We were lucky enough to catch a blue sea walnut."
Although sea walnuts are distributed worldwide, some beautiful colors have a very limited distribution range. For example, this azure blue sea walnut generally only exists in extremely cold waters.
"Is this thing an animal or a plant? It's completely transparent and I can't see any internal organs inside it." Fang Youqun asked.
"The sea walnut is a very simple animal. It has no heart, no eyes or ears, and no blood or bones in its body." Xia Pengjie answered.
Xiang Yang pondered for a moment, and suddenly said: "Xia Pengjie, your entire answer is inaccurate."
"Is it a plant?" Fang Youqun asked puzzledly.
Xiang Yang shook his head. "Of course it can't be a plant, but if we simply say it is an animal, that's not right either."
Now, everyone was confused.
It’s not a plant, and it’s not an animal either, so what is this
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 there were only a few species of creatures in the ocean."
Everyone nodded.
Everyone knows that about 500 million to 600 million years ago, there were only a few kinds of animals on Earth, such as worms, sponges, and jellyfish.
"After billions of years of evolution, the worms have now evolved into countless branches. Sponges and jellyfish have hardly changed from billions of years ago. As for sea walnuts, in fact, in the early years, biologists and natural scientists could not figure out whether they were animals or plants, so they have a special classification called phytozoa." Xiang Yang said.
From the appearance, the sea walnut does look more like a plant.
Therefore, biologists named the sea walnut after vegetables and fruits, and called it sea walnut.
However, the sea walnut is indeed an animal, and an animal that cannot live without meat. Various small crustaceans, small fish and shrimps are the sea walnut's favorite foods. Sometimes, the hungry sea walnut will even attack its own kind.
"Captain, can these sea walnuts be sold for money?" Fang Youqun asked.
Xiang Yang nodded, "Of course."
Fang Youqun's eyes lit up immediately when he heard this, "Then is this thing valuable?"
Xiang Yang smiled and shook his head, "I don't know yet."
Fang Youqun immediately became anxious, "Brother Yang, if it's valuable, it's valuable, and if it's worthless, it's worthless. How can you not know that?"
Xiang Yang pointed to the several diamond-shaped edges around the sea walnut's body that looked like carambolas and said, "These parallel strips on the sea walnut's body are actually its luminous strips. At night, it can emit very beautiful light, especially when it is swimming in the water in a winding way. The long tentacles behind it will also emit a pleasing blue light that flashes like neon."
Fang Youqun understood immediately after hearing this, "Brother Yang, what you mean is that we have to wait until night to see if this sea walnut is worth the money and see if the light it emits is beautiful or not?"
Xiang Yang nodded, "Yes, that's right. Even though they are both azure sea walnuts and can emit beautiful blue light, the difference caused by the different brightness of the light on their tail tentacles at night is also a world of difference."
Fang Youqun quickly said, "Captain, I'll put it in the water tank first."