What is coral......

Tang Hai once read a survey in which he randomly stopped 10 people on the side of the street, and basically all 10 people would answer that it was a rock, and if they answered that it was a living organism, they would also answer that it was a creature that looked like a rock......

The corals you see during the day and at night are different - ◢ with ◢ dream ◢ small ◢ say Щщш.suimeng.lā

During the day, most of the corals are indeed rocky, but at night all the corals wake up.

Coral activity at night is very different from daytime.

……

Tang Hai often wants to buy some red coral products, coral trees, ring noodles and the like, in Tang Hai's opinion, coral products are more beautiful than rubies.

However, Jennifer stopped him, telling him that corals are the best helpers to protect the ocean and people, and that there is no killing without buying and selling......

And Tang Hai's understanding of coral is only that 'this is a building where calcareous corpses accumulate after the death of polyps'.

From the Caribbean Sea to the Bahamas, to the coral areas of the United States and Canada further north, this area belongs to the coral system of the Atlantic.

The Panama Canal, which separates the Pacific Ocean from the Atlantic Ocean, has completely different coral communities on both sides, and millions or tens of millions of years ago, the corals of the two oceans developed towards different species......

If Xiao Tang wants to go to the sea to catch fish at this time, his first choice is coral reefs.

Polyps are very small creatures that eat simple algae, zooxanthellae and the like to obtain nutrients and calcium. The zooxanthellae, on the other hand, live on the poop of polyps, nutrients from ocean currents, and carbon dioxide emitted by polyps.

Just like Jennifer said, the reason why the clams can grow into the king of shellfish is actually because they have a way to raise zooxanthellae, other shellfish can only catch algae by luck, and the harvest is predestined, and the clams have changed from a 'nomad' in shellfish to a 'farming people', and it is obvious who has a fast population development......

What's even more curious is that the last time I heard Jennifer say this, Xiao Tang remembered a pure novel called "Raising a Daughter as a Wife", why not do the author's name. Xiao Tang felt that this was a kind of 'farming spirit', so he studied it with a critical spirit, and found that the writing was really pure, not at all like the famous anime Father's Love Like a Mountain......

The clams in shellfish are used to farm. The polyps of the animal kingdom also farm.

In this way, the clams grow bigger and bigger, and the coral reef can get bigger and bigger.

Larger coral reefs can hold back ocean currents, allowing nutrients to flood and plankton to form kelp colonies, which in turn can become nurseries for fish......

A lot of people don't know it. At least 30 percent of the world's fish spend their childhood on coral reefs, and 3 to 40 percent of the fish caught by humans are caught on coral reefs. All kinds of sea urchins, starfish, sea cucumbers, shrimp and crabs all like to live in coral reefs, and there are various plants they love.

The two biggest problems facing corals today are the unbearable acidity and the irresistible warmth.

In China, for example, 80% of corals have disappeared in China's waters over the past 60 years, so it is not surprising that offshore fisheries have been depleted.

One hectare is 15 acres. A healthy ocean can contain 500 kg to 1 ton of fish per hectare, and it is reasonable to catch 100 kg per year.

Reef-building corals and natural corals are comparable in the ability to raise fish and purify the environment, just like Tang Hai has always believed that the meat quality of domestic livestock is not necessarily inferior to that of wild ones, and it is safer, and free-range chickens are definitely better than pheasants......

And now people's research on corals has only explored how to concentrate breeding, centralized feeding and antibiotics.

There is still a long, long way to go before the day comes to make the domesticated ones better than the wild ones......

……

Xiao Tang has never observed how polyps feed.

Polyps are the phylum Cnidarians of the kingdom Animalia, that is to say they are in the same genus as sea anemones.

They are rarely seen active during the day. Tang Hai also felt that they were rocks, and when he went to the sea when it was dark, he saw all kinds of corals growing densely on the rock walls in the sea, such as coral bushes like stone tables, staghorn corals, and spherical corals......

All kinds of corals have their mouths open. The tentacles poked out of their stomachs, like tiny hands grasping at something.

Ordinary people can't tell how many creatures there are, and Tang Haitong can see that there is a slight difference in the light of each living form......

Some corals have few tubes, while others are as wide as a chrysanthemum.

Various transparent tubules have small spines on them, so they are cnidarians. Grab a little bit of their favorite food.

What surprised Tang Hai the most was that these corals not only moved and fed together, but they were also 'fighting' with different kinds of corals......

For example, there is a coral that looks like a tabletop, surrounded by a large bulb of coral.

The growth rate of the spherical coral is not as fast as the desktop coral, and it has lost its 'geographical advantage' at the beginning, but at this moment, the desktop coral surrounds it, and there is a gap between the two......

It is precisely because of the activities of corals that compete with each other, compete with each other, and compete for resources, so that there are various types of corals growing in a coral reef, and the diversity of coral structures makes the sea more nutritious and comprehensive.

Every time Tang Hai felt that he had understood enough, reality would slap him hard, for example, he often thought that his knowledge of the ocean was rich enough, and this time he went to the sea to remember some of the content of polyps that Jennifer had forgotten in the corner of his mind and told him a long time ago.

At a depth of about 200 meters, a giant shrimp more than half a meter long hid in a clump of coral, looking at itself vigilantly......

The most expensive fish in the world is not food, but ornamental fish, and India and Indonesia often use chloride toxins to anesthetize fish to catch them, and knock corals to scare fish.

In fact, this is more than worth the loss, short-sighted, because coral only grows a few centimeters a year, and the formation of a coral takes hundreds of years, which is more valuable than fish.

Xiao Tang's fingers rotated in the sea, his fingers turned into bait, and the big shrimp really came out on its own and was grabbed by Tang Hai.

"Haha, it's estimated that you have to hunt here during this time, so let the fish all come here!" Xiao Tang has a half-meter-long giant shrimp in his left hand and a two-pound arctic ginseng in his right hand, kicking on the bottom of the sea!

The two legs rotated with their bodies like propellers, and soon a submarine tornado was formed, and all kinds of microorganisms and small fish around the coral were swept into it, and when the number became more and more terrifying, Tang Hai had already jumped out of the sea and fell to the ground.

…… (To be continued.) )