Amphibious. The dragon can breathe air and water.

Acidic Warts. When an attack hits the dragon, creatures within 5 feet of it take 3 (1d6) acid damage

Sensitive Tongue. The dragon’s extended tongue is extremely sensitive. Creatures can aim at the tongue with an attack. The attack has disadvantage unless the creature is grappled by the dragon’s tongue. If the dragon takes 10 or more damage aimed at its tongue on a single turn, it attempts to flee to deep water at the start of its next turn.

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 4 (1d8) acid damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Tongue. Melee Weapon Attack: +8 to hit, reach 20 ft., one target. Hit: 3 (1d6) acid damage, and if the target is Large or smaller, it must succeed on a DC 16 Strength saving throw or be pulled up to 20 feet toward the dragon and grappled (escape DC 16). The dragon can only grapple one target at a time with its tongue.

Acid Breath (Recharge 5–6). The dragon exhales acid in a 30­-foot line that is 5 feet wide. Each creature in that line must make a DC 14 Dexterity saving throw, taking 49 (11d8) acid damage on a failed save, or half as much damage on a successful one.