Armor Class 16 (natural armor)
Hit Points 68 (8d10 + 24)
Speed 40 ft., swim 40 ft.
Senses passive Perception 9
Languages Common, Giant
Challenge 3
Limited Amphibiousness. The crab folk can breathe air and water, but it needs to be submerged once every 24 hours to avoid suffocating.
Multiattack. The crab folk makes two claw attacks.
Claw. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 7 (1d6 + 4) bludgeoning damage and the target is grappled (escape DC 14). Until this grapple ends, the crab folk can automatically hit the target with its claw, and the crab folk can't make attacks with that claw against other targets. The crab folk has two claws, each of which can grapple only one target.
MFF, p. 6