Menippe mercenaria is not endangered, but it is protected by United States Code Title 16, ch. 38, and the Magnuson-Stevens Fishery Conservation and Management Act. These laws recognize the need to regulate trapping of the stone crab, and establish that only one claw may be removed per stone crab (none if it is an ovigerous female) if it is at least 6.99 cm (2 and 3/4") from the first joint to the tip of the lower immovable finger.
US Federal List: no special status
CITES: no special status