How long does raw shrimp last in the fridge?

The short version: raw shrimp, kept properly cold, is usually only good for one to two days in the fridge — shorter than raw chicken, shorter than most fresh fish, shorter than almost anything else you would put in a cold drawer. That window is not a conservative rounding-up the way some fridge guidance is. Shrimp genuinely turns faster than most other proteins, and the counter display it came from was very likely frozen solid a few days before you saw it.

Why shrimp is shorter-lived than almost anything else in the fridge

Size and structure work against it. A shrimp is small, has a lot of surface area relative to its weight, and its flesh is soft and low in the connective tissue that slows bacterial spread in something like a beef roast. The digestive tract also sits close to the surface, right along the curve of the back, rather than sealed deep inside as it is in a larger animal. Together that means there is more surface for bacteria to work with and less structure standing in their way — the same reason ground meat spoils faster than a whole cut, only more so.

The "fresh" shrimp at the counter has usually already been frozen

This is the part that catches people out. Shrimp is typically frozen at sea or within hours of harvest because it does not hold up to a long, unrefrigerated supply chain any other way. What is sitting on ice at the seafood counter labelled "fresh" has, in most cases, been thawed by the store from that same frozen stock, sometimes a day or two before it reached the case. Nothing on the label tells you when that thaw happened, so the day you buy it is not day one of anything — it might already be day two or three of a very short clock. The practical response is not to distrust the counter, it is to buy shrimp close to when you actually plan to cook it, and to treat the two-day window as starting from the store's thaw date, not your purchase date, even though you usually cannot know exactly when that was.

What actually decides how long it keeps

Temperature. Shrimp does best stored directly on ice in the fridge, in a bowl or container that lets the meltwater drain away rather than pool around it, and toward the back of a middle shelf rather than the door. A few degrees matters more here than with almost anything else, given how short the baseline window already is.

Shell-on versus peeled. The shell is a physical barrier as well as a texture choice. Shell-on shrimp tends to hold slightly better than shrimp that has already been peeled and deveined, because peeling exposes more flesh to air and to whatever touched it during processing.

Whether it was previously frozen. Shrimp that reaches your fridge already thawed is working against a shorter clock than shrimp you thaw yourself, right before cooking, from a bag that stayed frozen the whole way home.

How to judge it yourself

• Smell for anything sharp, sour, or like ammonia. Raw shrimp has a mild, faintly briny smell — think seawater, not fish counter. A strong ammonia edge is one of the clearest spoilage signs seafood gives, and it is worth trusting over almost anything else on this list.
• Look at the colour. Fresh raw shrimp is translucent grey with a slight sheen. Flesh that has gone opaque, yellowed, or developed dull white patches has moved past its best.
• Check for black spots, especially around the head and legs. A little dark discolouration there is not automatically spoilage — it is a natural enzymatic process — but it is worth pairing with the smell check rather than ignoring on its own.
• Feel the texture. The flesh should feel firm and slightly springy. A slimy or sticky film that does not rinse off cleanly under cold water is a stop sign, not a rinse-and-continue situation.

Freezing, and why you should not refreeze it thawed

Raw shrimp freezes well and is one of the better arguments for buying it frozen in the first place rather than chasing the shorter counter window: a sealed bag straight into the freezer keeps good quality for months, well past what matters for safety. What does not work is refreezing shrimp once it has thawed and sat raw in the fridge — the same reasoning that applies to thawed meat generally applies here, only with less room for error given how quickly shrimp turns to begin with. If a bag thaws further than you needed, cooking what is left and freezing the cooked shrimp is the safer way to salvage it, rather than putting raw shrimp back in the freezer and hoping the short window survived a second trip.

None of this requires memorising a shelf-life chart at the fish counter. It requires knowing which day is actually day one, which is exactly the piece that gets lost once a bag of shrimp is sitting in a fridge next to three other things bought on three other days. Munch's opened-item tracking is built around that gap — marking something as opened, or logging when a previously frozen item went into the fridge, starts its own short countdown that everyone in the household can see, instead of everyone guessing separately at how long ago the ice on the counter display looked fresh.