ce large acid amphibious dragon 

Perception +15; darkvision, scent (imprecise) 60 feet

Languages Draconic

Skills Acrobatics +14, Arcana +12, Athletics +17, Deception +15, Intimidation +15, Stealth +16

Str +6 Dex +3 Con +4 Int +1 Wis +2 Cha +2

AC  25; Fort +17, Ref +12, Will +15

HP 125; Immunities acid, paralyzed, sleep

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 23

Tail Lash [R] Trigger A creature within reach of the dragon's tail takes an action to Strike or attempt a skill check; Effect The dragon Strikes with its tail at the triggering creature at a –2 penalty. If it hits, the creature takes a –2 circumstance penalty to the triggering roll.

Speed 40 feet, fly 100 feet, swim 40 feet

Melee [>] jaws +19 (acid, reach 10 feet), Damage 2d10+9 piercing plus 1d6 acid

Melee [>] claw +19 (agile), Damage 2d6+9 slashing

Melee [>] tail +17 (reach 15 feet), Damage 2d8+7 bludgeoning

Melee [>] horns +17 (reach 10 feet), Damage 1d8+7 piercing

Breath Weapon [>>] (acid, arcane, evocation) The dragon breathes a spray of acid that deals 8d6 acid damage in a 60-foot line (DC 25 basic Reflex save). It can't use Breath Weapon again for 1d4 rounds.

Draconic Frenzy [>>] The dragon makes two claw Strikes and one horns Strike in any order.

Draconic Momentum The dragon recharges its Breath Weapon whenever it scores a critical hit with a Strike.

Bestiary, page 105.