Amphibious.

The dragon can breathe air and water.

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 creature.

Hit: 20 (3d10 + 4) piercing damage.

Claw.

Melee Weapon Attack: +7 to hit, reach 5 ft., one creature.

Hit: 17 (3d8 + 4) slashing damage.

Salt Breath (Recharge 5-6).

The dragon exhales fine salt crystals in a 40­-foot cone. Each creature in that area must make a DC 16 Dexterity saving throw, taking 11 (2d10) bludgeoning damage on a failed save, or half as much damage on a successful one. A creature who fails their save is also blinded for 1 minute, has disadvantage on attack rolls and ability checks, and is unable to breathe as the salt hardens over any orifice on the creature’s body. A creature who fails their save by more than 5 is unable to take a breath as they become covered in salt and immediately starts suffocating. If a creature uses an action to pour at least 1 gallon of salt-free water over the victim, the victim is no longer affected by the dragon’s salt breath at the start of their next turn.