A crew friend once said to me: "On the shore of the ship, the bottom of the ship is a large seafood market, with all kinds of seafood, you can choose." #谣零零计划 #
To be honest, when I heard this sentence, I didn't believe it at all, because in my cognition, how could there be seafood at the bottom of the ship?
But when he sent me a picture of the bottom of the ship for repairs, I was stunned. As he put it, the bottom of the boat is really like a seafood market, with all kinds of seafood spreading all over the bottom of the boat.
Seeing so much seafood at the bottom of the boat, I said to him, so much seafood are you not making money? So much seafood must be able to sell for a lot of money, right?
He said to me in a joking tone, you want it? The next time the ship docks, I'll take you to pick it up, how much you want, but the premise is that you don't blame me if something goes wrong.
Later, I learned that the seafood at the bottom of the ship was really inedible, and if people ate it, it would kill people. Why is that?
Many people may not have a concept of ships, but in fact, our merchant ships are far larger than aircraft carriers. Since the ship was built, whether it is during navigation or anchored state, it must have been floating in the sea, and nature will definitely absorb a lot of shells under the ship, which we can also call seafood. In fact, the price of these seafood is very expensive, and for a ship, if it is cleaned up comprehensively, it will definitely be able to clean up a lot. When our ships dock at port, when the seafarers are bored, they always go to the rocks on the side of the harbor to clean up some seafood to eat themselves, but basically no one eats the seafood at the bottom of the ship.
What is the seafood at the bottom of the ship?
When you think of seafood, you may immediately think of octopus, pippi shrimp, pike crab, oysters... But the dozen tons of seafood that appear at the bottom of the ship may not be your favorite, because the attachments at the bottom of the ship, mainly some microorganisms, diatoms, barnacles, mussels (rainbows), etc., are actually 90% infamous barnacles!
It is said that barnacles are really seafood! Every year in July, when the barnacles are at their fullest, some fishermen living by the sea will cook the shelled barnacles in water, and then take the meat out of the shell like a conch, and then enjoy it!
In the case of barnacles, for example, it can secrete a super sticky substance that allows itself to stick firmly to the attachment, they are not afraid of the wash of the sea, and they can even rely on the nutrients brought by the water to maintain life! This is also the reason why 90% of the attachments at the bottom of the ship are barnacles!
The attachment to the bottom of the boat, in addition to barnacles, there are some diatoms, barnacles, mussels and various microorganisms, these are not seafood, it has an official name, called "marine fouling"! If they are not cleared up in time, they will multiply and grow under the ship, increasing the weight of the hull, and leading to increased resistance to navigation, fuel consumption is getting higher and higher, and the corresponding pollution emissions will increase!
Why can't the seafood at the bottom of the boat be eaten
(1). Ships will emit a large amount of waste diesel during the voyage, and the parasitic shellfish on the bottom of the ship basically rely on filtering microorganisms in seawater for a living, which will inevitably filter the oil-stained seawater into the body when filtering, so that seafood will have oily smell and odor, which cannot be eaten at all.
(2). During the voyage of large ships, they are generally sailing at sea for several months or even longer, and the domestic garbage and wastewater on the ship will also be discharged into the sea at this time, and the seafood grown at the bottom of the ship can be imagined whether it can be eaten.
(3) People who have experienced living by the sea know that not only the seafood at the bottom of the ship cannot be eaten, but even the seafood in the port cannot be eaten, because the sea surface in the port is floating with "stinky oil", and the seafood grown in such a seawater environment cannot be eaten at all.
In order to remove the attachments to the bottom of these boats, under normal circumstances, 3 ways are taken to clean them up.
1, the use of high-pressure cleaner spraying to remove pollution
It is to spray a large amount of sand on the hull of the ship through the machine, and then increase the friction through the sand to remove the impurities attached to it.
2. Ask the underwater operator to clean it up
The easiest way to do this is to ask an underwater operator to go to the bottom to remove these marine life attached to the bottom of the ship.
However, no matter which way it is taken, in the end, the rusty place will be polished and polished, and then the bottom of the ship will be coated with thick anti-rust paint and anti-fouling paint.
These anti-fouling paints are mainly applied for two main benefits, one is to prevent rust caused by seawater corrosion, and the other is to prevent these marine organisms from attaching to it.
In particular, these paints contain two substances, "copper oxide" and "mercury oxide", which are harmful to marine life and can reduce the adhesion of marine organisms to the hull.
Therefore, once these substances are absorbed by the marine organisms attached to them, it is likely to lead to human poisoning.
Especially mercury, long-term absorption of mercury can cause mercury poisoning in the human body, abdominal pain, diarrhea, hematuria and so on.
If these marine attachments absorb these paints from the bottom of the ship, they may be toxic, and these marine attachments will also absorb a large amount of waste diesel discharged by the ship during the voyage, so it is best not to eat such seafood.
Bottom seafood can not be eaten, because many of them are highly toxic, if we eat, then the harm to our body is very large.
The impact of seafood on the bottom of the ship is also very large, but there is no better way to stop the growth of marine life on the bottom of the ship.
We hope that in the future we can prevent marine life from attaching to the bottom of the ship, and we hope that the seafood under the boat will not flow into the market and enter our table.
