The white worms inside the belly of Pelteobagrus fulvidraco are parasites. Because the fish in the winter before more or less with a certain amount of parasites, water temperature, these parasites are very easy to reproduce, so that the fish body a lot of infections.

It's normal for fish to have parasites, basically all the fish on the market now have them. Don't be too nervous, high temperature can kill the parasites. When you eat, clean up, some of the fish's internal organs are not edible, such as: liver, gall bladder, and so on, because I do not know what it has eaten, not digested are left in the internal organs. p>1, kill the parasites carried by the fish

In order to prevent parasitic disease outbreaks, you can use some safe, efficient, pollution-free drugs on the market, more thoroughly kill the small number of parasites carried by the overwintering fish itself.

2, improve the water environment

Insufficient oxygen will produce a large number of toxic intermediates, so that the resistance of the fish is greatly reduced, the chance of infection, including parasites, various types of diseases increased.

In addition to appropriate water changes, it is important to maintain high dissolved oxygen in the water and a good water environment, and water quality improvers and disinfectants can be used on a regular basis.

Baidu Encyclopedia - Fish Parasites and Parasitic Diseases