Tiny Beast, unaligned
Armor Class 13 (natural armor)
Hit Points 18 (4d4+8)
Speed swim +20, walk +30
Challenge 1/4
Damage Immunities psychic
Condition Immunities charmed, frightened
Senses darkvision 60 ft., passive Perception 10
Languages -
Amphibious. The crab can breathe air and water.
Whip-claw. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) slashing damage, and the target is grappled (escape DC 8). While grappled, the target cannot speak or cast spells with verbal components.
Source: Tome of Beasts · OGL/Open