初期为食欲下降，体表失去光泽，变成没有透明感的青白色。

During the initial period of the disease, loss of appetite, loss of surface luster, becoming there is no clear sense of the Qing Baize.

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随着寄生范围的扩大，体表失去光泽，粘液分泌量增多，鱼因食欲减退而变得虚弱。

With the expansion of host range, surface of fish becomes dull, mucus secretion increase more, and the fish become weaker due to loss of appetite.

youdao

随着寄生范围的扩大，体表失去光泽，粘液分泌量增多，鱼因食欲减退而变得虚弱。

With the expansion of host range, surface of fish becomes dull, mucus secretion increase more, and the fish become weaker due to loss of appetite.

youdao