pf2e.fyi
From Pathfinder #216: The Acropolis Pyre, which isn't enabled.

Bristled Reef Shark

CREATURE 1

Small enough to slip through labyrinthine corals yet large enough to overpower potential prey, bristled reef sharks prowl coastal reefs at night. By day, they're gregarious creatures that congregate in large groups and communicate with each other by performing dance-like maneuvers. On occasion, the sharks team up to drive away predators or mob large prey; more often, they dart for cover amid the corals. Those that aren't fast enough to avoid being swallowed by orcas and larger sharks flare their dorsal spines, forcing most predators to cough up the bristled shark who quickly flees to safety.


Perception +7; scent (imprecise) 100 feet; blood scent
Skills Acrobatics +7, Athletics +5, Performance +6
Str +1, Dex +4, Con +2, Int -4, Wis +1, Cha +2
Blood Scent

The shark can smell blood in the water from up to 1 mile away.


AC 16; Fort +7, Ref +10, Will +4
HP 21
Bristle
Trigger The bristled reef shark becomes Grabbed, Restrained, or otherwise Immobilized in a creature's grasp

Effect The shark flares its bristles, dealing 1d6 piercing damage to the triggering creature (DC 17 basic Reflex). If the creature critically fails, the shark can also try to Escape as part of this reaction.

Speed swim 35 feet
Melee Jaws +5, Damage 1d8+1 piercing
Compression

When a bristled reef shark successfully Squeezes, it moves though the tight space at half speed (or full speed on a critical success).

Reef Rake
Requirements The shark's last action was a successful jaws Strike, and the target is adjacent to a solid surface like a wall or reef

Effect The shark attempts an Athletics check to Reposition the target into the adjacent surface. If successful, the target is thrown into the surface and takes 2d6 bludgeoning damage. If the surface is jagged (such as a reef), target instead takes 2d6 slashing plus 1 bleed damage. This neither applies nor counts toward the shark's multiple attack penalty.
Pathfinder #216: The Acropolis PyreORC