Flower clams can't spit sand when they're dead, and they're usually inedible when they die before going into the pot. Live clams should not be placed in the freezer, but in the freezer of the refrigerator (freezer temperature is usually around 0-2 °), can be left for half a day, and if it is more than 24 hours, the clams will open, when the clams are already dead. Clams that have been dead for more than 2 hours are no longer fit for consumption.