Amphibious. The crab can breathe air and water. Lumbering. The mudcrab is incapable of Jumping, Dodging or taking the Dash action.
Multiattack. The Giant Mudcrab can make up to two attacks, one with its Bite or two with its Pinch. Bite. Melee Weapon Attack: +5 to hit, reach 5 ft, one creature. Hit: (2d6 + 3) piercing damage. Pinch. Melee Weapon Attack: +5 to hit, reach 10 ft, one creature. Hit: (1d6+3) bludgeoning damage, and the target is grappled (escape DC 13). The crab has two claws, each of which can grapple only one target.