There is a local specialty crab in Laizhou, Yantai, which is called Flower-winged Crab (I don't know if the Portunus crab just applied for geographical indication is this kind), that is, it is between the female crab and the male crab under the navel, and it is said to be the second mother and son. This crab is very fresh, fat and delicious.

Zoological experts explain that the so-called "second mother and son" crabs that people often say are actually female crabs in the process of growth, and they are also common crabs raised in non-oceans. After eating, it has no effect on the human body, just like a normal crab.

relevant information

Crab (páng xiè) is a crustacean, belonging to a decapod mollusk. Its body is protected by a hard shell and it breathes through its gills. Taxonomically, it is the same kind of animal as shrimp, lobster and hermit crab.

Most kinds of crabs live in the ocean or offshore areas, and some live in fresh water or land. Common crabs are Portunus trituberculatus, Portunus trituberculatus, Eriocheir sinensis and Eriocheir sinensis (Eriocheir sinensis, Eriocheir sinensis and Eriocheir sinensis).