Reef Shark

Medium beast, unaligned
Armor Class 12 (natural armor)
Hit Points 22 (4d8 + 4)
Speed 0 ft., swim 40 ft.
STR
14 (+2)
DEX
13 (+1)
CON
13 (+1)
INT
1 (-5)
WIS
10 (+0)
CHA
4 (-3)
Skills Perception +2
Senses blindsight 30 ft., passive Perception 12
Languages -
Challenge 1/2 (100 XP)

Pack Tactics. The shark has advantage on an attack roll against a creature if at least one of the shark's allies is within 5 feet of the creature and the ally isn't incapacitated.

Water Breathing. The shark can breathe only underwater.

ACTIONS

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) piercing damage.

Reef sharks measure 6 to 10 feet long, and inhabit shallow waters and coral reefs.
Monster Manual (SRD) D&D 5 › Monsters