A month later, the fish's tail was a little crooked.
Suffering from swim bladder disease. First of all, properly feed the fry of the golden fish, once in the morning and once in the evening, so as not to affect the healthy growth of the goldfish. Tail bending is caused by swim bladder disease of goldfish. After goldfish suffers from swim bladder disease, it is necessary to raise the water temperature of goldfish and help goldfish treat it.