Amphibious. The mirelurk king can breathe air and water.

Tyrant of the Shoals. Friendly mirelurks within 30 feet of the king have advantage on attack rolls.

Multiattack. The mirelurk king makes two claw attacks or one claw attack and uses Sonic Screech.

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) slashing damage.

Call of the Deep. The Mirelurk king summons 1d4 Mirelurks which arrive at the end of the king’s next turn.

Sonic Screech (Recharge 5–6). The mirelurk king unleashes a deafening scream in a 30-foot cone. Creatures in the area must make a DC 16 Constitution saving throw, taking 27 (6d8) thunder damage on a failure, or half as much on a success. On a failed save, creatures are also stunned until the end of their next turn.