Amphibious. The merrow can breathe air and water.
Multiattack. The merrow makes two attacks: one with its bite and one with its claws or harpoon.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 ( 1d8+4 ) piercing damage.
Claws. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 ( 2d4+4 ) slashing damage.
Harpoon. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 11 ( 2d6+4 ) piercing damage. If the target is a Huge or smaller creature, it must succeed on a Strength contest against the merrow or be pulled up to 20 feet toward the merrow.