How Long Does Clams (Raw, in Shell) Last?

Live clams need to be handled differently from almost anything else in this site's seafood section, since freshness here is really a life-or-death check rather than a smell-and-texture one — a live clam's shell should be closed, or should close within a few seconds of being tapped; any clam that stays open or fails to close should be discarded, not cooked, since that means it's already dead and unsafe. A strong fishy or distinctly ammonia smell coming from a bag of clams before they're even opened is a sign the whole batch has turned and shouldn't be salvaged piece by piece.

Live clams need airflow to survive their short 1-2 day fridge window, so storing them in an open bowl covered loosely with a damp cloth, rather than sealed in an airtight bag or container, actually matters for keeping them alive that long — a sealed bag can suffocate them faster than the clock would otherwise run out. After cooking, any clam that never opened during cooking should also be discarded rather than pried open and eaten, since a shell that stays shut through heat usually means the clam was already dead going into the pot.

A live clam that's slightly open but closes when tapped is still alive and fine to cook; it's only a clam that stays open, or one that feels unusually light and empty when picked up (a sign the shell is empty or the clam inside has died and partially decomposed), that should be discarded before cooking. Buying clams as close as possible to when they'll be cooked, rather than planning to store them for the full 1-2 days, gives the best odds that the whole batch is still alive and usable.

See Clams (Raw, in Shell)'s full storage & shelf-life guide (with spoilage signs) →