Amphibious: The dragon can breathe air and water.
Bite: Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: (1d10 + 2) piercing damage plus (1d6)poison damage.
Poison Breath (Recharge 5-6): The dragon exhales poisonous gas in a 15-foot cone. Each creature in that area must make a DC 11 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one.