There are certain specifications and standards for this. The crabs whose specifications reach ≥200g for males and ≥ 150g for females are super crabs; Male crabs ≥ 150g, and female crabs ≥ 125g are first-class crabs; Male crabs ≥ 125g, and female crabs ≥ 100g are secondary crabs. Anything below 100g cannot be called Yangcheng Lake Hairy Crab, and the special name and logo of Yangcheng Lake Hairy Crab shall not be used.
Secondly, it depends on the fatness of hairy crabs: male crabs ≥0.57g/㎝3 and female crabs ≥ 0.46 g/㎝ 3; Sex gland ratio: male crab ≥ 2.0%, female crab ≥ 8.0%; Water content: male crab ≤74.05, female crab ≤ 63.0; Crude fat: male crab ≥ 7.0%, female crab ≥ 9.0%; Crude protein: male crab ≥14.0%, female crab ≥15.0%.