lg huge amphibious dragon water 

Perception +23; darkvision, scent (imprecise) 60 feet

Languages Aquan, Common, Draconic, Dwarven, Elven, Gnomish; speak with animals

Skills Acrobatics +22, Arcana +28, Athletics +24, Diplomacy +23, Intimidation +23, Occultism +24, Stealth +22

Str +7 Dex +3 Con +4 Int +5 Wis +4 Cha +4

AC  34; Fort +24, Ref +23, Will +26; +1 status to all saves vs. magic

HP 260; Immunities electricity, paralyzed, sleep

Electricity Aura (aura, electricity) 10 feet, 1d12 electricity damage. The bronze dragon can turn this aura on or off using a single action, which has the concentrate trait, and it can choose to not affect allies with the aura.

Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 31

Attack of Opportunity [R] Jaws only.

Speed 40 feet, fly 140 feet, swim 50 feet

Melee [>] jaws +28 (electricity, magical, reach 15 feet), Damage 2d12+15 piercing plus 1d12 electricity

Melee [>] claw +28 (agile, magical, reach 10 feet), Damage 2d10+15 slashing

Melee [>] tail +26 (magical, reach 15 feet), Damage 1d10+13 bludgeoning

Arcane Innate Spells DC 33; 2nd obscuring mist (at will); Constant (2nd) speak with animals

Breath Weapon [>>] The bronze dragon breathes in one of two ways. The dragon can't use Breath Weapon again for 1d4 rounds.

• Lightning (arcane, electricity, evocation); The dragon breathes lightning in a 80-foot line that deals 8d12 electricity damage (DC 33 basic Reflex save).
• Repulsion Gas (abjuration, arcane, incapacitation, mental); The dragon breathes a 80-foot line of repulsive gas. Each creature in the area must succeed at a DC 33 Will save or become fleeing from the dragon for 1 round (or 2 rounds on a critical failure).

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

Draconic Momentum When the dragon scores a critical hit with a Strike, it recharges its Breath Weapon.

Water Mastery (arcane, transmutation, water) For up to 60 minutes per day, the dragon, along with allied creatures and vessels within 50 feet, can move at double their normal Speed in water.

Bestiary, page 120.