Can freshly deceased crabs be consumed?
Apr 14, 2022
Source: Cainiu Health
Dr. Liu Zhengxin
Introduction
Freshly deceased crabs must not be consumed. Crabs that have been dead for an extended period, nearly dead “drunken crabs,” or crabs of unknown origin must also be strictly avoided. These crabs contain substances harmful to human health and may cause food poisoning upon ingestion. Moreover, the taste and texture of dead crabs deteriorate significantly: under the action of decarboxylase enzymes, histidine is converted into histamine and histamine-like compounds.
Many people enjoy eating crabs in autumn, but preserving them properly is quite challenging. If you purchase too many crabs and store them improperly, they can die easily. Upon finding freshly deceased crabs, many people feel it’s wasteful to discard them directly into the trash—but they’re also hesitant to consume them, fearing potential poisoning. So, can freshly dead crabs be eaten?
Can freshly dead crabs be eaten?
Freshly dead crabs should not be consumed. Crabs that have been dead for an extended period must absolutely not be eaten. Likewise, avoid consuming crabs that are near death (e.g., “drunken crabs” showing signs of imminent demise) or crabs of unknown origin. These crabs may contain harmful substances that can cause food poisoning or other illnesses upon ingestion.
The taste and texture of dead crabs deteriorate significantly. Crab flesh contains histidine, which—under the action of decarboxylase enzymes—is converted into histamine and histamine-like substances. Shortly after death, the crab’s hepatopancreas (digestive gland) rapidly breaks down, releasing histidine and digestive enzymes that degrade the meat, resulting in poor texture and markedly diminished palatability.
To preserve live, fresh crabs: restrain their legs to minimize energy expenditure, then store them in the refrigerator—preferably on the fruit drawer shelf. Cover the crabs with a damp towel (do not wring it too tightly nor fold it). This method allows short-term storage. Alternatively, crabs can be raised in water. For underweight crabs intended for fattening prior to storage, feed them sesame seeds and eggs, supplemented with yellow rice wine to promote weight gain. We hope this information proves helpful.
