This appears to be a mass of floating intestines tangled around a fanged mouth—the tips of its coils also end in toothy maws.
Nyogoth CR 10
AC 24, touch 15, flat-footed 19 (+5 Dex, +9 natural)
hp 125 (10d10+70)
Fort +14, Ref +12, Will +7
Defensive Abilities acid spray; DR 10/lawful; Immune acid, cold, poison, mind-affecting effects; Resist electricity 10, fire 10
Speed 5 ft., fly 30 ft. (good)
Melee 4 bites +15 (1d6+3/19–20 plus 1d4 acid), bite +15 (2d6+3/19–20 plus 1d4 acid)
Special Attacks horrific appearance (DC 18)
Spell-Like Abilities (CL 10th; concentration +13)
Str 16, Dex 21, Con 24, Int 9, Wis 19, Cha 16
Base Atk +10; CMB +13; CMD 28 (can’t be tripped)
Feats Combat Reflexes, Improved Critical (bite), Power Attack, Vital Strike, Weapon Finesse
Skills Fly +22, Intimidate +16, Knowledge (planes) +12, Perception +17, Stealth +18
Languages Abyssal; telepathy 100 ft.
A nyogoth’s body is full of highly corrosive digestive fluid. Every time a nyogoth is damaged by a piercing or slashing weapon, all creatures adjacent to the nyogoth take 1d6 points of acid damage (2d6 acid damage if the attack is a critical hit).
Creatures that succumb to a nyogoth’s horrific appearance become nauseated for 1d8 rounds.
Environment any (the Abyss)
Organization solitary or brood (2–8)
The nyogoth’s role on the Abyss is that of a scavenger. Essentially mobile clumps of buoyant intestines, these writhing creatures squirt through the air in convulsive movements like an octopus gliding through water, and are constantly on the search for anything smaller than one of their many mouths (either the relatively small ones that pinch and gasp at the tips of their intestinal limbs or the larger gaping one at their cores). They can subsist on the waste and filth left behind by other denizens of the Abyss, but particularly enjoy feeding on still-living creatures.
Despite their seemingly lowly role in Abyssal ecosystems, the nyogoths are far from stupid beasts. Most are nearly as intelligent as the average human, and are capable of solving relatively complex problems when it comes to securing the next meal. As outsiders, nyogoths do not need to eat to survive, yet this does not exempt them from hunger—a nyogoth that goes for longer than 12 hours without a meal becomes increasingly violent and erratic. Such a “starving” nyogoth typically fights to the death when the prospect of food is available, and may even resort to self-cannibalism, drinking its own spurting digestive juices from its wounds in a nauseating display.
A typical nyogoth is 5 feet in diameter and weighs 260 pounds, although they are known to grow much larger.
Pathfinder Roleplaying Game Bestiary 2, © 2010, Paizo Publishing, LLC; Authors Wolfgang Baur, Jason Bulmahn, Adam Daigle, Graeme Davis, Crystal Frasier, Joshua J. Frost, Tim Hitchcock, Brandon Hodge, James Jacobs, Steve Kenson, Hal MacLean, Martin Mason, Rob McCreary, Erik Mona, Jason Nelson, Patrick Renie, Sean K Reynolds, F. Wesley Schneider, Owen K.C. Stephens, James L. Sutter, Russ Taylor, and Greg A. Vaughan, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.