Large Beast, unaligned
Armor Class 12 (natural armor)
Hit Points 45 (6d10+12)
Speed swim +40
Challenge 2
Skills perception +2
Senses darkvision 30 ft., passive Perception 12
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: +6 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage.
Source: 5e Core Rules · OGL/Open