Why do fishermen poke a hole in the belly of marine fish when they are released? Don't you feel cruel?
On some sea fishing boats, the fishermen often poke a hole in the fish with a needle before releasing them. Every time I see such a scene, many people can't help but condemn this cruel behavior. They think that the fishermen are harming the fish, but the fishermen say they are doing it for the good of the fish. You may not believe this statement, but the truth is that this is not the malicious interest of sea fishermen, but really for the sake of fish. Only by pumping a hole for sea fish can they return to the sea to live a normal life.
what the hell is going on here? Let's get to know each other together. As we all know, fish can float up and down freely in the water, largely because of the fish ladle. Fish can control the air content in the fish ladle according to their own needs, thus adjusting the internal air pressure, and then complete the demand of floating or diving. However, directly exposed to the water, the external air pressure has little effect on freshwater fish, so freshwater fish can be released directly. Marine fish is different, because marine fish live in the sea, and the sea is very deep, and the more it goes down, the stronger the water pressure is.
therefore, in order to cope with great pressure, the fish scoop of marine fish is more powerful than that of freshwater fish. At ordinary times, marine fish also adapt to this pressure. If the fisherman suddenly pulls it out of the sea with strong pressure and exposes it to the external environment with low pressure, the fish has not been able to adjust the air pressure in its body in time, and its scoop has been filled with air. At this time, it is more dangerous for marine fish, because with the expansion of the float, other organs in the fish will be squeezed, and in serious cases, the eyes and internal organs of the fish may be squeezed out. In more serious cases, some fish scoops will directly burst, resulting in the death of the fish.
This is often the case with hairtail, which we often eat. Fishermen salvage it from the sea, and when it comes out of the sea, many of it will explode and die. Therefore, it is difficult for us to see the hairtail alive and kicking in the market, and the hairtail is basically frozen. It is precisely for this reason that when a marine fisherman catches a small fish and wants to release it, he needs to poke a hole in the belly of the marine fish with a needle to release some air, so that the fish can regain the ability to adjust the air pressure in the body, so that the fish can live normally in the sea.
If released directly into the sea, he may float on the sea all the time, unable to live a normal life, even being eaten by other predators, and may suffer from decompression sickness, which is also very unfavorable for fish. Although it is good for the fish to poke a hole in the belly of the released marine fish, many friends will worry about whether this hole will affect the life of the fish in the future and whether its body will be infected. In fact, for the sake of fish's life, they are all tied with needles, and the hole will not be too big.
In addition, the fish has a strong self-healing ability, and this small hole can heal quickly, allowing the fish to return to normal life. If the operation is normal, it will basically not endanger the health of the fish. However, it is necessary to test the operator's skills when sticking the hole, and the fish can recover faster by sticking the hole in a suitable position. At the same time, we should also be careful not to go too deep and hurt the fish's internal organs, otherwise it will be a kind of harm to us, so some people who like sea fishing can learn relevant knowledge, so that if they want to release marine fish, they will know how to do it correctly.