Dragon, Topaz Young (CR 6)
AC: 21 (+11 natural), touch 10, flat-footed 21
Hit Dice: 13d12+26 (110 hp)
Fort +10, Ref +8, Will +11
Speed: 40 ft., fly 150 ft. (poor), burrow 5 ft., swim 60 ft.
Space: 5 ft./5 ft.
Base Attack +13; Grapple +16
Attack: 1 Bite +16, 2 claws +11, 2 wings +11 melee; Breath +16 ranged
Damage: 1 bite 1d8+3, 2 claws 1d6+1, 2 wings 1d4+1, Breath weapon 6d8 (18)
Special Attacks/Actions: Breath Weapon 6d8 (18)
Abilities: Str 17, Dex 10, Con 15, Int 16, Wis 17, Cha 16
Special Qualities: Cold immunity, water breathing
Feats: #Feats: 5
Skills: Skill points: 45
Advancement: 14-15 HD (Medium-size)
Climate/Terrain: Inner Planes, any aquatic
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard
Monster Manual II
Breath Weapon (Su): A topaz dragon breathes a cone of dehydration that looks like a watery blast. When directed against an aqueous liquid (water or a liquid composed mainly of water), this effect evaporates one cubic foot of water per hit point of damage dealt. Each creature within the cone takes the indicated damage (6d8), or half that amount with a successful Reflex save (DC 18). Using a breath weapon is a standard action. Once a dragon breathes, it can't breathe again until 1d4 rounds later. A blast from a breath weapon always starts at the dragon's mouth and extends in a direction of the dragon's choice.
This subtype usually is used for elementals and outsiders with a connection to the Elemental Plane of Water. Creatures with the water subtype always have swim speeds and can move in water without making Swim checks. A water creature can breathe underwater and usually can breathe air as well.