This monster appears in the Dungeons & Dragons Player's Handbook 2024.
Traits
Amphibious. The crab can breathe air and water.
Actions
Claw. Melee Attack Roll: +3, reach 5 ft. Hit: 4 (1d6 + 1) Bludgeoning damage. If the target is Medium or smaller, it has the Grappled condition (escape DC 11). The crab has two claws, each of which can grapple one target.