Amphibious. The crab can breathe air and water. False Appearance. While the crab remains motionless, it is indistinguishable from an inanimate rock.
Multiattack. The mudcrab can Pinch twice on each of its turns. Pinch. Melee Weapon Attack: +3 to hit, reach 5 ft, one target. Hit: 4 (1d4 + 1) bludgeoning damage, and the target is grappled (escape DC 11). The crab has two claws, each of which can grapple only one target.