Armor Class 15 (natural armor)
Hit Points 297 (17d20 + 119)
Speed 60 ft., swim 60 ft.
STR
28 (+9)
DEX
10 (+0)
CON
24 (+7)
INT
6 (-2)
WIS
10 (+0)
CHA
13 (+1)
Saving Throws Con +12, Wis +5
Damage Resistances cold, fire, lightning; bludgeoning, piercing, and slashing that is nonmagical
Damage Immunities poison
Condition Immunities charmed, frightened, poisoned
Senses darkvision 120 ft., passive Perception 10
Languages understands Abyssal but can't speak
Challenge 14 (11500 XP)
Amphibious.
Magic Resistance.
Magic Weapons.
Secure Memory.
Standing Leap.
Bite.
Disgorge Allies (Recharge 6).