A sign of spoiled fish includes:

Spoiled fish typically displays noticeable signs that indicate it has gone bad, and cloudy eyes along with a foul odor are two of the most critical indicators. Fresh fish should have clear, bright eyes; when the eyes become cloudy, it suggests that the fish is no longer fresh and may have begun to spoil. Additionally, a foul odor is a strong signal of spoilage as fresh fish should have a mild, ocean-like scent.

The presence of these signs indicates the breakdown of proteins and the development of bacteria, making the fish unsafe for consumption. Recognizing these indicators is essential for food safety and helps prevent foodborne illness.

In contrast, bright red gills signify freshness, as do firm and moist skin and a smooth skin texture, all of which are characteristics of fish that have not spoiled. These attributes are helpful for identifying fresh seafood, distinguishing them from signs of spoilage.