You can tell if raw shrimp is bad if the shrimp disintegrates into mush as you handle it, if it smells rotten, if it has black spots on the sides (not just the “vein” down the back), and the ...

Both types of prawns, when sold raw, are likely to have been frozen at some point, even if you buy them chilled: check the label before purchasing if you want to freeze them. If you’re not ...