This small creature resembles a cross between a monkey and a fish, with gangly arms and legs, bulging eyes, scaly skin, and webbed fingers and toes.


XP 50 ()

CE Small ()

Initiative +2


AC 12

hp: 7 (2d6)

Saving Throws: Dex +4


Speed: 25 ft., swim 30 ft.

Multiattack: A gillmonkey bites once and attacks once with claws.

Melee Attack—Bite: +4 to hit (reach 5 ft.; one creature). Hit: 1d6 + 2 piercing damage.

Melee Attack—Claw: +4 to hit (reach 5 ft.; one creature). Hit: 1d6 + 2 slashing damage.


Str 8 (–1), Dex 15 (+2), Con 10 (+0),

Int 10 (+0), Wis 12 (+1), Cha 9 (–1)

Languages: Unique (Gillmonkey)

Skills: Stealth +4

Senses: Darkvision 60 ft., tremorsense 60 ft. (when in water)


Amphibious: A gillmonkey can breathe equally well in air or underwater.


Environment: Saltwater or

Organization: School (2–20) or colony (20–200)

Gillmonkeys are nasty, monkeylike creatures that live in the sea. They are native to saltwater, but they sometimes swim up rivers and into lakes to hunt or raid. They have hairless, pinkish-brown skin that is lightly scaled. Short appendages like tentacles grow from the tops of their heads, but they seem to be used only for handling food.

Gillmonkeys never fight alone; if someone is attacked by one gillmonkey, they will be attacked by more. Individually, gillmonkeys are weak and cowardly (more generous observers might call them shy), but in groups they can be quite dangerous—and they always travel in groups. When they attack, they swarm over a ship’s rails like waves crashing up from the sea.