Infected fish may be lethargic and show areas of bleeding in the gills and skin.
受感染的鱼可能是疲乏和显示领域的出血，在鳃和皮肤。
2
For Tilapia, the fluorine was ta -, Ken from water by digestive system, gills and skin, then spread '? To whole body.
罗非鱼通过消化道、鳃和体表(表皮)摄取水中的氟、经过血液迅速扩散分布至全身。
3
For example, a part of the skin may be drawn out into tufts to make gills or pushed in to make lungs, thus increasing the oxygen-absorbing surface in proportion to th animal's bulk.