Bean crab. Chen Xiaojun has a small crab to eat in a flower shell. That kind of small crab is called bean crab, which is non-toxic and does not affect the consumption of flower shells. Bean crabs are as small as beans and have high nutritional value. It is a kind of hermit crab and is considered as a "dwarf patient" among crabs. It looks like beans, so it's called bean crab.