How Can You Tell If Squid Has Gone Bad?

The quickest way to tell that squid has spoiled is by its smell: fresh squid smells mildly salty and like the sea, while spoiled squid gives off a sharp ammonia odor. Cooking does not remove this smell, so checking the odor when buying or using squid is a reliable first check on its own. What do color and texture indicate? Fresh squid flesh is glossy, translucent, and whitish pink; its skin is purplish brown. If the color becomes dull, especially if yellowish or gray patches appear across the flesh, the squid has lost its freshness. Fresh squid feels firm and elastic, and a spot pressed with a finger springs back right away. Spoiled squid feels soft and loose, and the indentation remains. The eyes offer another clue: fresh squid has bright, full eyes, while stale squid has sunken, cloudy eyes. The tentacles should cling together firmly and remain intact; as squid spoils, they loosen, come off easily, and develop a sticky surface. What do packaging and storage time tell you? A bulging vacuum-sealed package or cloudy, foamy liquid inside indicates that bacterial growth has begun; discard the package unopened. Fresh squid should generally be cooked within 1–2 days in the refrigerator. Squid kept longer is considered risky even if changes in color and smell are not yet obvious. Do not refreeze frozen squid after thawing; cook it the same day it thaws. If the liquid collecting around the squid during thawing has turned gray rather than cloudy pink and there is a sharp odor, discard the squid. There is also a difference between sliced squid rings and whole cleaned squid: rings are thinner, exposing more surface area to air, so signs of spoilage appear faster than they do with whole squid. Therefore, checking the package date is especially important when buying pre-cut squid. As soon as you bring fresh squid home from the market or fishmonger, storing it over ice in a perforated container works better than leaving it in its own liquid. Squid left in its own liquid spoils faster and softens sooner. Rinsing it with cold water also keeps its temperature from rising and bacteria from growing faster. Check frozen squid packaging as well: a thick layer of ice crystals inside the bag, or squid pieces frozen together into one solid block, suggests the squid may have thawed once and been refrozen, meaning its quality may already have declined before the package is opened. Cooking does not always deactivate toxins that form when squid spoils. Therefore, if even one of the smell, color, and texture signs above appears, reject the squid before cooking it. When in doubt, throw it out; a normal smell and look alone do not prove it is safe.