Grindylow

Creature 0

Small
aberration
amphibious

Perception: +5; darkvision
Languages: Thalassic
Skills: Athletics +5, Stealth +7, Survival +5; Str +1, Dex +3, Con +2, Int −1, Wis +3, Cha +0
Items: spear

AC: 15; Fort +6, Ref +7, Will +5
HP: 14

Reactive Strike (Special) ⟲ A grindylow gains 1 extra reaction at the start of each of their turns that they can use only to make a Reactive Strike with a tentacle. They can't use more than one Reactive Strike triggered by the same action or choice.

Speed: 10 feet, swim 25 feet

Melee ◆ bite +7 (finesse), Damage 1d6+1 piercing

Melee ◆ tentacle +7 (agile, finesse, trip, unarmed), Damage 1d4+1 bludgeoning plus Grab

Melee ◆ spear +5, Damage 1d6+1 piercing

Ranged ◆ spear +7 (thrown 20 feet), Damage 1d6+1 piercing

Clinging Suckers When a grindylow successfully Grabs a creature larger than themself, they attach to that creature. The Grabbed creature is not Immobilized, but if it moves, the grindylow moves with it.

If the creature is Medium or smaller, it takes a –5-foot status penalty to its Speeds while the grindylow is attached. The grindylow is Off-Guard while attached to a creature.

Effect: Clinging Suckers

Jet ◆◆ (move) The grindylow moves up to 60 feet in a straight line through the water without triggering reactions.

Grab ◆

Source: Pathfinder Monster Core

Running this fight? Add the grindylow to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.