There are many species of crabs, and differing sizes of claws. So a definitive answer can not be given, without more information.
Yes. The hermit crab usually lives in a pod of 25 or more. So, the more the better. But, hermit crabs can get territorial, so have plenty of space. And, some crabs will pick on crabs of the same size. They feel they are a threat.
Some hermit crabs are omnivorous, so they probably would eat chicken. However, some hermit crabs are herbivores: these species would not eat chicken. See the related Wikipedia link listed below for more information:
Some types of crabs I know of are fiddler crabs, hermit crabs and horseshoe crabs.
mostly at night cause that is when they most active.
spider
Mr. Crabs.
No, but it is more likely that crabs will like you if you are exposed to them.
no, some crabs eat seaweed
some crabs, like hermit crabs
Yes. Some more often than others.
There are a couple hundred different species of crayfish, but the one most commonly eaten in the US is the red swamp crayfish (Procambarus clarkii), about 95% of which come from Louisiana.