Huge Beast, unaligned
Armor Class 13 (natural armor)
Hit Points 126 (11d12+55)
Speed swim +50
Challenge 5
Skills perception +3
Senses blindsight 60 ft., passive Perception 13
Blood Frenzy. The shark has advantage on melee attack rolls against any creature that doesn't have all its hit points.
Water Breathing. The shark can breathe only underwater.
Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 22 (3d10 + 6) piercing damage.
Source: 5e Core Rules · OGL/Open