To identify dead crabs, look, smell and pinch.
1, see: look at the color, dead crab color dull.
Fresh crabs cooked back bright red, bright white abdomen, while the dead crab back dark red, gray abdomen, gray.
2, smell: dead crabs have a rotten flavor.
Live crabs cooked is fresh seafood flavor, if you think the crab itself is very stinky should be the inherent fishy smell of seafood, get used to it does not feel the stink, and dead crabs due to the meat has been corrupted, the rotten meat is cooked there will be a particularly pungent stench, different from the rancid stench of the meal spoiled.
3, pinch: dead crabs are very soft after cooking.
Live crabs are hard after being cooked, and their shells will not be concave when pressed by hand, while dead crabs are soft because they have begun to rot, so they will be pressed down when pressed gently by hand.