Amphibious. The orange dragon can breathe air and water.

Multi attack. The young orange dragon makes two claw attacks and a bite attack. 

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., 1 target. Hit: 15 (2d10 + 4) piercing damage plus 7 (2d6) fire damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 11 (2d6 + 4) slashing damage. 

Explosive breath (Recharges 5/6). The orange dragon exhales a orange oil like substance in a 5ft wide, 30ft long line. Each creature within the line must make a DC 14 Dexterity saving throw or be coated in the burning mixture which deals 7 (2d6) fire damage on contact and another 7 (2d6) fire damage at the start of the creature's next turn. On at the start of the creature's next turn or if the creature comes into contact with water the creature has a 10ft radius explosion centered on themselves dealing 28 (8d6) fire damage to the creature and 14 (4d6) thunder damage to all other creatures in the radius.