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

Fresh fish exhibits several key characteristics that indicate its quality and safety for consumption. Clear, bulging eyes signify that the fish is fresh because as fish age, their eyes often become cloudy and sunken. Bright red gills are another indicator of freshness; they should appear vibrant and moist, as darker or duller gills may indicate that the fish is past its prime. Additionally, a fresh fish should have no strong fishy odor; a mild ocean-like scent is normal, but a strong fishy smell suggests spoilage or degradation.

When it comes to the option indicating a strong fishy odor, this contradicts the qualities of fresh fish. A strong fishy odor typically means that the fish has begun to spoil, leading to a decline in its freshness and quality. Edible fish should not emit such unpleasant aromas, making this choice indicative of the opposite of freshness. Thus, the presence of a strong fishy odor supports the idea that the fish is no longer fresh and safe to eat.