Fish, Piranha Swarm (3pp)

Beneath your dangling feet swarms a roiling school of fish. Their tiny mouths flash with the glint of sharp, razor-like teeth.

Piranha Swarm CR 2

XP 600
N Diminutive animal (aquatic, swarm)
Init +2; Senses low-light vision, keen scent; Perception +10


AC 16, touch 16, flat-footed 14 (+2 Dex, +4 size)
hp 16 (3d8+3)
Fort +4, Ref +5, Will +2
Immune weapon damage, swarm traits
Weaknesses swarm traits


Speed swim 40 ft.
Melee swarm (1d6)
Space 10 ft.; Reach 0 ft.
Special Attacks distraction (DC 12), killing frenzy


Piranha are highly aggressive and attack in swarms any living creature detected in the water.

Piranha swarms hunt during the day and are usually dormant at night. Some species are ambush hunters and hide in a single clump of seaweed or coral, shooting out to attack prey when it moves nearby. They attack using their razor sharp teeth, biting and gnashing their prey. Once blood is spilt, the piranha swarm enters a killing frenzy.


Str 4, Dex 15, Con 12, Int 2, Wis 13, Cha 2
Base Atk +2; CMB –; CMD
Feats Endurance, Skill Focus (Perception)
Skills Perception +10, Swim +10


Keen Scent (Ex)

A piranha swarm can notice creatures by scent in a 60-foot radius and detect blood in the water at ranges of up to 100 feet.

Killing Frenzy (Ex)

A piranha swarm that detects blood in the water enters a frenzied state the following round, along with all other piranha swarms within a 100-foot radius. Frenzied piranha swarms bite until they or their opponents are dead. A frenzied piranha swarm gains a +2 bonus to damage and -2 AC for 1 minute. The swarm cannot end the killing frenzy voluntarily.


Tome of Horrors Complete
Support Open Gaming


Environment warm aquatic
Organization solitary, pack (2-4 swarms), or school (6-11 swarms)
Treasure none

Piranhas are deadly carnivores found only in warm waters, such as seas, lakes, rivers, and streams.

A piranha swarm’s diet consists mainly of other fish, though mammals, birds, and amphibians caught in the water serve as a fine meal too.

Piranhas are small, 8 to 12-inch long black or silvery-black fish with large bulging eyes and a tiny mouth lined with razor-sharp teeth. They are generally black or silver with a red underbelly or mottled red spots on their scales. Eye color is usually gray or silver.

Piranhas are related to both quippers and giant caribes.

Section 15: Copyright Notice

Piranha Swarm from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene.

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