Amphibious. The yellow dragon can breathe air and water.

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

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

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

Salt breath (Recharges 5/6). The yellow dragon exhales a torrent of liquid salt in a 5ft wide, 30ft long line. Each creature within the line must make a DC 14 Dexterity saving throw or be coated in liquid salt which hardens quickly and restrains the creature but that creature can make a DC 15 Strength check, bursting the salt cocoon on a success. The webbing can also be attacked and destroyed (AC 13; hp 10; vulnerability to bludgeoning damage; immunity to lightning, poison, and psychic damage).