Amphibious. The dragon can breathe air and water.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 1d10+2 piercing damage plus 2 1d4 acid damage.
Acid Breath (Recharge 5-6). The dragon exhales acid in a 15-foot line that is 5 feet wide. Each creature in that line must make a DC 11 Dexterity saving throw, taking 22 5d8 acid damage on a failed save, or half as much damage on a successful one.