Medium Beast, Unaligned
Armor Class 14 Natural armor
Hit Points 20 (1d4 - 1)
Speed 5 ft., Swim 40 ft.
STR
6 (-2)
DEX
16 (+3)
CON
8 (-1)
INT
1 (-5)
WIS
7 (-2)
CHA
2 (-4)
Senses Darkvision 60 ft., Passive Perception 7
Languages --
Challenge 1 (200 XP)
Proficiency Bonus +2
Traits

Water Breathing. The piranha can breathe only underwater.

Armored skin.  Take 1 less damage from non-magical bludgeoning piercing and slashing. 

Actions

Bite. Melee Attack Roll: +5 (with Advantage if the target doesn’t have all its Hit Points), reach 5 ft. Hit: 2 Piercing damage.

Reactions

Frenzy - If any creature takes damage within 5 feet of them they make a Bite attack on that creature.

Habitat: Underwater

WAYNEBRETTSKY