安徽刘金鸣问:鱼儿怕热吗? 答:鱼儿都是一些“娇气鬼”,它们既怕冷,又怕热,动不动就拒食。鱼类属于变温性的动物,它们的体温随水温而变化,一般相差0.5℃～1℃左右。鱼儿对所寓居的水体,也有严格要求,除水温外,还对水的酸碱度有所挑剔,水中其它的有害物质也不能超量。鱼儿反抗环境的办法,首先是“绝食”。稍有不适,就不进食。如果外部条件进一步恶化,例如水温过高过低,水中缺氧,水体偏酸,或其它有害物质过量等等,鱼儿就会昏 Liu Jinming, Anhui asked: Is the fish afraid of heat? A: The fish are some “squeamish”, they are both cold, afraid of heat, refused to eat at every turn. Fish are warm-temperate animals, their body temperature changes with the water temperature, the general difference of about 0.5 ℃ ~ 1 ℃. The fish live in the water, there are strict requirements, in addition to water temperature, but also critical pH of water, water, other harmful substances can not be excessive. Fish anti-environmental approach, first of all, “hunger strike.” Slight discomfort, do not eat. If the external conditions further deteriorate, such as water temperature is too low, water oxygen, water body acid, or other harmful substances in excess, etc., the fish will faint