All of the following are signs that fish is fresh, except:

Fresh fish is characterized by several key quality indicators. One of those indicators is the absence of a strong fishy odor. Fresh fish typically has a clean, ocean-like scent or no smell at all. A pronounced fishy odor suggests that the fish is likely not fresh and may have begun to decompose.

In contrast, bright, clear eyes, a firm texture, and bright red gills are all positive signs of freshness in fish. Bright, clear eyes indicate that the fish is fresh and has been properly handled, while a firm texture suggests that the fish was caught recently and has not deteriorated. Bright red gills are a sign of healthy, fresh fish since gills that are dull or brown indicate age or spoilage. Thus, a fishy odor is the one sign that contradicts the freshness of fish.