Generally speaking, you only need to steam crabs for about fifteen to twenty minutes if you use a regular pot.
Steaming with a pressure cooker is faster and only takes about eight minutes. In addition, the size of the crab will determine how long it will take to steam.
For example, it takes about twelve minutes to steam a three-tiered crab, and about ten minutes to steam a crab under three-tiered. For crabs above three taels, add one or two, and it will take about two minutes more to steam.
In addition to steaming crab time need to pay attention to, in the steaming crab is cold water in the pot steam, so that the steamed crab will be tender meat, no fishy taste; and if you use hot water to steam the crab, then it will be fishy and hard.
Crab (páng xiè): animal kingdom, phylum Arthropoda, crustacean subphylum, soft armor, true soft armor subclass, decapods, abdominal embryo suborder, short-tailed lower order. It is a crustacean (crustacean) whose body is protected by a hard shell and which breathes by gills. In biological taxonomy, it is the same kind of animal as shrimp, lobster and hermit crab.
The vast majority of species of crabs live in or near the sea, with some inhabiting freshwater or land. They rely on their mother crabs to give birth to their young, and each time she lays many eggs, which can number in the millions or more. Crabs rely on the geomagnetic field to determine direction. China has a long history of eating crabs, as documented in "Yi Zhou Shu - Wang Hui Xie" and "Zhou Li - Tian Guan - Baoren" .
The number of genetic material in these creatures is complex and highly variable, often numbering more than 100 pairs. Common crabs include hairy crabs (river crabs, hairy crabs, clear-water crabs), pike crabs and so on. China's crab is very rich in resources, including the lower reaches of the Yangtze River, Gucheng Lake hairy crabs, Taihu Lake hairy crabs, Gaoyou Lake hairy crabs, Yangcheng Lake hairy crabs, Crab House hairy crabs, Xinghua hairy crabs, hairy crabs produced by Hongze Lake hairy crabs for the top quality.