5e SRD:Hunter Shark
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Large beast, unaligned
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.
Smaller than a giant shark but larger and fiercer than a reef shark, a hunter shark haunts deep waters. It usually hunts alone, but multiple hunter sharks might feed in the same area. A fully grown hunter shark is 15 to 20 feet long.