Fresh fish must have which of the following characteristics?

Fresh fish should indeed exhibit bright red gills, prominent clear eyes, and firm elastic flesh. Bright red gills indicate that the fish is fresh and that it has good, oxygen-rich blood, which is a sign of vitality. Clear eyes are another indicator of freshness, as cloudy or dull eyes can suggest that the fish is past its prime and not suitable for consumption. Firm elastic flesh is a crucial quality; when you press the flesh of fresh fish, it should bounce back, indicating that it has been well-preserved and is not too old. These characteristics combined help to ensure that the fish is safe to eat and of high quality, making option A the correct choice.