fish parasites

例句：

1. 1. The disease is caused by the parasites that live in the fish's gills.
   这种疾病是由生活在鱼鳃中的寄生虫引起的。
2. 2. Parasites can cause serious health problems for humans and other animals.
   寄生虫可以对人类和其他动物造成严重的健康问题。
3. 3. In some cases, parasites can be treated with medication or surgery to remove them from the body.
   在某些情况下，寄生虫可以通过药物治疗或手术从身体中移除。