水源污染是个大问题。一旦水源污染，水中的鱼也会受到不同程度的污染。污染严重的鱼体内含有毒素，人吃了有损健康。所以，掌握一些辨别污染鱼的知识，非常必要。一、看鱼形污染较严重的鱼体形不整齐，如脊柱弯曲，鱼鳞部分脱落，体表发黄，鱼肉颜色改变。有的鱼肚膨胀，... Water pollution is a big problem. Once the water pollution, water fish will also be different levels of pollution. Polluted fish contain toxins in the body, eating is detrimental to health. Therefore, it is necessary to have some knowledge of the contaminated fish. First, look at the fish-shaped pollution more serious fish body shape is not neat, such as the curvature of the spine, scales off, body surface yellow, fish color change. Some fish belly bulge, ...