There are the ones that you can only remove the 2nd claw and then had to throw it back? That's the rule in other states.
Back in the 1980's my buddy and I would catch loads of rock crabs technically jonah crabs off the Long Branch fishing pier in the ocean. It burned down many years ago. They would fill the crab trap most times 5 or 6 in atrap. The best part is in the claws. There is a fishery for them now off the New England coast. You can buy the claws at a lot of fish markets in NJ and at BJ's wholesale club. They are similar to Florida stone crab,. Pic of them