Hold Breath. The Semuanya Crocodile can hold its breath for 30 minutes.

Multiattack. The Semuanya Crocodile makes two attacks: one with its bite and one with its tail.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 5) piercing damage, and the target is grappled (escape DC 16). Until this grapple ends, the target is restrained, and the crocodile can't bite another target.

Tail. Melee Weapon Attack: +6 to hit, reach 10 ft., one target not grappled by the Semuanya Crocodile. Hit: 14 (2d8 + 5) bludgeoning damage. If the target is a creature, it must succeed on a DC 16 Strength saving throw or be knocked prone.

Death Roll. When grappling a foe of its size or smaller, a Semuanya Crocodile can perform a death roll upon making a successful grapple check. As it clings to its foe, it tucks in its legs and rolls rapidly, twisting and wrenching its victim. The Semuanya Crocodile inflicts its bite damage and knocks the creature prone. If successful, the Semuanya Crocodile maintains its grapple.