There are several ways:Judge whether the pike crab is fat or not by its color. You can observe the reverse side of the pike crab at the sharp corners of the two ends and the belly button. Usually, if the belly and navel of the pike crab with three warts are red, then the meat of the pike crab with three warts is preferably creamy and fatty. Pinch the crab's feet to determine if the pike is fat. By looking at the crab's feet, fat crabs have harder feet, so pike crabs are fatter. If the pike crab is pinched thin and the shell is pinched off, it is not easy to recover, don't choose a bad crab. See that the crab cover is generally thick. The crab yolk of pike crabs with three warts is generally richer. You can open the crab lid to see if there is any caviar. If there is too much, it means that the crab is fatter.