Item: crustaceacycle, works on land and underwater equally. Must be fed once a day; will accept nearly any non-bone animal or non-woody plant matter, and so if not presented with food, carrion, or vegetation, may start nibbling on leather armor or even unattended familiars.

Can attack with its claws, as a Giant Crab: Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage, and the target is Grappled (escape DC 11). The crab has two claws, each of which can grapple only one target.