A contagious disease of tropical marine and freshwater fishes, caused by a protozoan (Ichthyophthirius multifiliis) and characterized by small white pustules on the skin and eyes.

• 鱼虱虫病热带海洋或淡水鱼类的一种传染病，由纤虫原生动物（多子小瓜虫）引起，特征为皮肤和眼睛上起白色小脓疱