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Sea Spider, Pelagos

This creature resembles similar arachnids found on land. Its color ranges through various shades of blue and green with distinct black markings. Its legs and bodies are covered with thousands of fine, sticky hairs.

Pelagos Sea Spider CR 15

XP 51,200
N Huge magical beast (aquatic)
Init +8; Senses darkvision 60 ft., low-light vision, watersense 60 ft.; Perception +31


AC 28, touch 12, flat-footed 25 (+4 Dex, +16 natural, -2 size)
hp 230 (20d10+120)
Fort +20, Ref +16, Will +12
Resist acid 10, cold 10, fire 10


Speed Swim 90 ft.
Melee bite +26 (2d8+7 plus poison plus grab), 4 slams +25 (2d6+7)
Space 15 ft.; Reach 10 ft.
Special Attacks swallow whole (2d6+7 plus 1d8 acid damage, AC 18, 23 hp)
Spell-like Abilities (CL 20th):

3/day--cone of cold (DC 19), lightning bolt (DC 17) (affects a 30-ft. radius around the pelagos rather than a single target)
1/day--stinking cloud (DC 17)


Str 25, Dex 16, Con 22, Int 20, Wis 18, Cha 18
Base Atk +20; CMB +29 (+33 grapple); CMD 43 (55 vs. trip)
Feats Alertness, Fast Swim*, Cleave, Combat Reflexes, Great Fortitude, Improved Initiative, Iron Will, Power Attack, Swim-by Attack, Weapon Focus (bite)
Skills Diplomacy +24, Escape Artist +24, Knowledge (nature) +25, Knowledge (religion) +25, Perception +31, Sense Motive +28, Stealth +17 (+25 when floating on the surface) , Swim +20; Racial Modifiers +8 Stealth when floating on the surface
Languages Aquan, Common, Draconic, Elven, Sylvan


Poison (Ex)

Bite—injury; save Fort DC 26; frequency 1/round for
4 rounds; effect 1d3 Con damage; cure 2 consecutive saves.

A creature that dies from this poison turns into water and flows away (and is irrevocably dead save for a miracle, wish, or the intervention of a deity). The save DC is Constitution-based.

Watersense (Ex)

A pelagos can pinpoint the location of anything within 60 feet that is touching the water.

Tome of Horrors Complete
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Editor's Note
There is no feat called Fast Swim; GM's should feel free to ignore this feat since the creature already has more than its requisite number of feats.
Base Creature