17 (natural armor)
76 (8d12+24)
walk 20 ft., swim 30 ft.
Stealth +2
blindsight 30 ft.
5
The crab can breathe air and water.
While the crab remains motionless with its eyestalks and pincers tucked close to its body, it resembles a natural formation or a pile of detritus. A creature within 30 feet of it can discern its true nature with a successful DC 15 Intelligence (Nature) check.
The crab makes two attacks with its claws.
Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 20 (3d10 + 4) bludgeoning damage, and the target is grappled (escape DC 15). The crab has two claws, each of which can grapple only one target