Why do fishmongers always pack fish in black bags? Actually, there are several reasons for this. One of them is that the cost of thick black plastic bags is slightly lower, and the other main reason is that seafood put in this way is not easy to die. Because it is opaque, fish will think it is black, so their metabolism will be smaller, they will be in a low consumption state, and the oxygen consumed by activities will be less, so fish will live longer.

In fact, every industry in life has its own habits. These habits are all for a reason, and they are all experiences summed up from life. We know that it used to be very difficult to transport seafood. These seafood will panic and flee when they see creatures nearby, resulting in excessive physical strength and oxygen consumption. So when transporting goods, black spaces are used. In fact, it was the same when transporting soldiers in the past. Also, on the plane, you should always close the shutter. In fact, it is to make everyone lose interest and tension in the outside world, reduce people's excitement, and then reduce the consumption of oxygen in the air. In fact, such examples are very common in life.

If the live fish is put in a transparent bag, it will see the people or things around it, feel the danger approaching and want to escape, so it will waste energy nervously, and the probability of fish death will be much higher. Fishermen must have discovered this secret in the long-term transportation process and are now using it. People who don't know the inside story must think that the low cost of black plastic bags is not the main reason.

Of course, this is for those active fish. If it's a kind of loose sardine, it's not necessary, but catfish should be put in. Because catfish are very sensitive to environmental changes and jump up and down, don't transport sardines to places before they die. These are actually summed up in life practice. We call it the "catfish effect".

If the journey is long, fishermen will also fill their bags with some oxygen, which will make the fish live longer. Now there are logistics companies that can transport seafood long distance, of course, all by air, and they are alive and need oxygen. Even small pets can be transported by express delivery. The wisdom of mankind is getting higher and higher. It used to be difficult to transport plants, but now it can be so high. I wonder if it will be entrusted to humans in the future.

There are many things worth observing and learning in life. We should learn to experience with our hearts, think with our brains and sum up more useful and beneficial experiences. Instead of simply thinking about one thing, comprehensive thinking will help us judge and understand things.

Although the cost of black plastic bags is low, it is definitely not the main reason compared with the profit of seafood. Mainly to improve the survival rate of seafood, so that it will not die or consume too much during transportation, especially when crabs are transported in cold storage.