Which of the following is not a sign of bad fish?

Elastic flesh is considered a sign of fresh fish rather than bad fish. Fresh fish should have a firm, elastic texture when pressed; this elasticity indicates that the fish is still safe to eat and has not begun to spoil. In contrast, signs such as off-odor, gray or greenish gills, and sunken eyes are indicators of fish that may be spoiled or not fresh. An off-odor can point to the breakdown of proteins and spoilage bacteria. Gray or greenish gills indicate a lack of freshness, as the gills should be bright red or pink in healthy fish. Sunken eyes can also signify that the fish has been exposed to poor handling or has started to deteriorate. Thus, recognizing the texture of the flesh as elastic helps differentiate between fresh and spoiled fish.