This streamlined reptile has a long, serpentine neck, at the end of which glares a many-fanged head.
Plesiosaurus CR 2
If a plesiosaurus successfully hits a foe with its bite attack in the surprise round, it inflicts an additional 1d6 points of damage and threatens a critical hit on an 18–20. The additional damage from the ambush attack itself is precision damage and is not multiplied on a successful critical hit.
Environment temperate or warm swamps or water
Organization solitary, pair, or school (3–7)
While not technically a dinosaur, the plesiosaurus is often found in waterways and swamps where dinosaurs and other megafauna are common. Long-necked and swift, these ambush predators prefer to dart in, bite a foe, and then swim away to hide while they wait for their victim to bleed out before swimming back to feed.
Numerous species of this creature exist, from marsh-dwelling varieties to creatures that spend their entire lives at sea.
A plesiosaurus measures 11 feet long, though nearly half of this length is neck, and weighs 1,000 pounds.
Pathfinder Roleplaying Game Bestiary 5 © 2015, Paizo Inc.; Authors: Dennis Baker, Jesse Benner, John Bennett, Logan Bonner, Creighton Broadhurst, Robert Brookes, Benjamin Bruck, Jason Bulmahn, Adam Daigle, Thurston Hillman, Eric Hindley, Joe Homes, James Jacobs, Amanda Hamon Kunz, Ben McFarland, Jason Nelson, Thom Phillips, Stephen Radney-MacFarland, Alistair Rigg, Alex Riggs, David N. Ross, Wes Schneider, David Schwartz, Mark Seifter, Mike Shel, James L. Sutter, and Linda Zayas-Palmer.