Is catfish really the dirtiest fish? Is it true to eat feces? Does it contain harmful substances?

Catfish is a common food in daily life, but some people say that catfish is the dirtiest fish and eats feces. It will be unhealthy for catfish to eat too much. So is catfish really the dirtiest fish? Is it true to eat feces? Does it contain harmful substances?

Is it true that catfish eat feces?

In fact, it is true that catfish eat feces, but animal manure itself is a non-toxic and cheap natural fertilizer, which provides a lot of nutrients for plankton in the water. Even fish farmers will deliberately feed some pig manure and chicken manure to fish.

Aquaculture does not put animal manure directly into fish ponds. Generally speaking, animal feces contain a large number of pathogenic bacteria and parasitic substances, and if they are directly poured into the pond, they will affect the safety and health of fish, so they will be fermented before they are put, so that not only the harmful substances can be eliminated, but also the macromolecular proteins in feces can be decomposed into small molecular proteins that can be used more easily, so as to improve the utilization effect.

Regular farms are not allowed to dump garbage and fat water directly into the water, which will affect the health of fish and reduce fish production, which outweighs the gain for farmers. Animal faeces are fermented before eating, so not only catfish eat feces, but other fish also eat feces.

Is catfish the dirtiest fish?

Catfish may live in a dirty environment, but that doesn't mean catfish are dirty. If the water quality is bad, it will also affect the normal reproduction and healthy growth of catfish, and even the harmful substances in the water will lead to poisoning and death of the fish. Catfish live in a relatively dirty water environment, in contrast, catfish are more resistant to some harmful substances, such as heavy metal cadmium. Some online claims that catfish are the dirtiest fish can not be believed.

Does catfish contain harmful substances?

Catfish are omnivorous animals, small fish and shrimp are in the catfish predation range, in a relatively high position in the food chain. But all carnivorous large animals will have certain harmful substances, which is the inevitable result of the food chain. But these harmful substances have little impact on the human body. In regular farms, normal catfish do not have pollution problems such as excessive heavy metals, so they can rest assured to eat.

Fourth, does the catfish grow fast with hormones?

Catfish are omnivorous animals with a short growth cycle. In some areas with high water temperatures in the south, some catfish are on the market after about 4 months of feeding. It's not the hormones, it's the characteristics of the catfish itself. What's more, the national monitoring and restrictions on aquatic feed are so strict that it is almost impossible to add hormones.

5. How to choose catfish?

1. Pay attention to its color and slime when buying catfish. The mucus on the surface of catfish also has a certain protective effect on the fish itself. When the mucus is transparent or translucent, it proves that the fish is relatively fresh and healthy; if the mucus has turned white or even smells rotten, it proves that the fish may have harmful substances such as bacteria, so don't buy it.

2. Choose the fish with intact and fresh body. After buying it back, it is recommended to keep it in clean water for a few days so that it can properly discharge some impurities and other substances.