Let the bathtub be used as a temporary pond, gently put the bought fresh crabs into it, inject water just past the crabs, let them stand up and breathe, and put a small amount of small fish and shrimp into the water according to the time required for preservation. This preservation method can make crabs survive for 7 days or longer, and the bathtub wall is smooth, so crabs can't escape.

Bread crab refers to the species of Arthropoda, Crustacea, Decapoda, Zodiac or steamed crab. Bread crab head breastplate light brown; There are semi-circular reddish-brown markings in the eye area; There are reddish-brown spots on the outer membrane of wrist joint and long joint of claw and foot; Toes are brown. The breastplate of the male head is 62mm long and 83mm wide. The breastplate of the female head is 70.0 mm long and 93.0 mm wide.