Eurypterid, Spiny

This scorpion-like aquatic predator has a pair of large pincers and a spiny carapace that clicks and grinds as it moves.

Spiny Eurypterid CR 9

XP 6,400
N Huge vermin (aquatic)
Init +3; Senses darkvision 60 ft., low-light vision, tremorsense 30 ft.; Perception +1


AC 22, touch 7, flat-footed 22 (–1 Dex, +15 natural, –2 size)
hp 114 (12d8+60)
Fort +13, Ref +3, Will +5
Defensive Abilities spiny carapace; Immune mind-affecting effects


Speed 10 ft., swim 40 ft.
Melee 2 claws +15 (1d8+8/19–20), sting +15 (1d8+8 plus poison)
Space 15 ft.; Reach 15 ft. (20 ft. with sting)
Special Attacks rend (2 claws, 1d6+12)


Str 26, Dex 9, Con 20, Int —, Wis 13, Cha 2
Base Atk +9; CMB +19; CMD 28
Feats Improved Critical (claw)B, Improved InitiativeB
Skills Swim +16
SQ amphibious


Poison (Ex)

Sting—injury; save Fort DC 21; frequency 1/round for 6 rounds; effect 1d4 Con and 1d2 Dex; cure 2 consecutive saves.

Spiny Carapace (Ex)

Thousands of razor-sharp spines cover the carapace of a spiny eurypterid. Any creature that attacks a spiny eurypterid with a light weapon, natural attack, or unarmed strike takes 1d6 points of piercing damage. Any creature that grapples or is grappled by a spiny eurypterid automatically takes 2d6 points of piercing damage each round that the grapple is maintained.


Environment warm oceans
Organization solitary
Treasure none

The spiny eurypterid is a voracious predator that swims in deep tropical waters.

Section 15: Copyright Notice

Pathfinder Roleplaying Game Bestiary 6 © 2017, Paizo Inc.; Authors: Robert Brookes, Benjamin Bruck, John Compton, Paris Crenshaw, Adam Daigle, Crystal Frasier, James Jacobs, Thurston Hillman, Tim Hitchcock, Brandon Hodge, Jason Keeley, Isabelle Lee, Jason Nelson, Tim Nightengale, F. Wesley Schneider, David Schwartz, Mark Seifter, Todd Stewart, Josh Vogt, and Linda Zayas-Palmer.

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