Boiled crabs can be eaten overnight if properly preserved.

Crab is the decapod order of short-tailed sub-order of the common name, rich in bacteria and parasites, the body is broad and flat, a few narrow and long, the cephalothorax encased in developed cephalothoracic armor, cephalothoracic armour shape varies according to the species; frontal shortened, compound eyes in the 2nd tentacle on the outer side of the mouth part including the large jaws with hard teeth, the abdomen degraded flat, folded in the cephalothoracic armour ventral surface, the males slightly triangular or narrow elongate, and the female abdomen is broad, the female abdomen is broad, the male is slightly triangular, or narrow elongated, and the female abdomen is broad. Female abdomen is broad, mostly oblong or rounded, with five pairs of thoracic peduncles on either side of the ventral surface of the cephalothoracic armor, the first pair being pincer-like.

The crab lives in different depths of the subtidal zone, a small part of the growth and reproduction entirely in fresh water, more inhabited in mountain streams under the rocks, the vast majority of omnivorous, except for freshwater crabs, most of the mating is carried out in the female molt, spawning fertilized eggs are discharged from the body, adhering to the female abdominal limbs, until hatching.

Distribution range

Most crabs are marine, with the largest number of tropical shallow-sea species, such as frog crabs, bun crabs, jade crabs, pike crabs, fan crabs mainly live in the littoral zone, square crabs, sand crabs live in the vast intertidal zone. Very few, such as the drifting crab and bowlegged crab can be attached to wood or other floating objects, there are also many species and other animal camp **** habitat life, such as the family of sheep crabs, Guan Gong Crab family, many species such as bean crabs often submerged into some mollusks in the outer coat cavity, or polychaetes in the pipeline **** habitat.

Shan Cryptoceratidae, however, live in the sac formed by reef-building corals, female crabs are confined to the sac for life after mating, the hatchlings can escape through the unclosed pore, a small portion of the crabs are completely in the freshwater growth and reproduction, they are mostly inhabited in the mountainous areas under the rocks of the stream, and there are a few crabs, such as the ground crabs can be adapted to life on land, burrowing in the wet mud holes, the breeding period is migrated to the sea.