鱼肉变质怎么说英语

In English, we would say that fish becomes spoiled or rotten if it goes bad. This usually happens when the fish is not stored or handled properly, or when it is left out at room temperature for too long. It can also happen if the fish is not fresh when it is purchased, or if it is not cooked properly. When fish goes bad, it can develop an unpleasant odor, taste, and texture, and it can also be harmful to eat. It is important to handle and store fish properly to prevent it from going bad.