This enormous worm is covered with mottled blue-and-green plates of chitinous armor. Its giant, tooth-filled mouth is the size of an ox.
Aquatic Worm CR 12
OFFENSESpeed 20 ft., swim 40 ft.
Melee bite +25 (4d8+12/19–20 plus grab), sting +25 (2d8+12 plus poison)
Space 20 ft.; Reach 15 ft.
Special Attacks swallow whole (4d8+18 bludgeoning damage, AC 21, 20 hp)
STATISTICSStr 35, Dex 6, Con 25, Int 1, Wis 8, Cha 8
Base Atk +16; CMB +32 (+36 grapple); CMD 40 (can’t be tripped)
Feats Awesome Blow , Critical Focus, Improved Bull Rush, Improved Critical (bite), Power Attack, Staggering Critical, Weapon Focus (bite, sting)
Skills Perception +18, Swim +20
SPECIAL ABILITIESPoison (Ex) Sting—injury; save Fort DC 25; frequency 1/round for 6 rounds; effect 1d4 Strength damage; cure 3 consecutive saves. The save DC is Constitution-based.
Environment any aquatic
Aquatic worms are giant scavengers that consume any organic material they encounter. They are notorious for swallowing their prey whole. It is not uncommon to hear of a group of adventurers vanishing down the ravenous maw of an aquatic worm.
The insides of an aquatic worm may contain a considerable number of gemstones and other items able to withstand the corrosive acid inside its gullet.
Although not completely mindless, aquatic worms are rather stupid. They make popular guardians for those who have the magic to control them or an area of their lair large enough to hold one captive.