This streamlined reptile has a long，serpentine neck，at the end of which glares a many–fanged head.

Source Bestiary 5 pg. 83

XP 600

N Large animal

先攻 +7；感官 Keen Scent，low–light vision，scent；察觉 +6

AC 14，touch 13，flat–footed 10（+3 敏捷，+1 Dodge，+1 natural，–1 size）

HP 19（3d8+6）

强韧 +5， 反射 +6， 意志 +3

速度 5 尺，swim 60 尺

近战 bite +5（2d6+6 plus 1 bleed）

占据 10 尺， 触及 10 尺

特殊攻击 ambush attack +1d6，bleed（1）

力量 18， 敏捷 17， 体质 14， 智力 2， 感知 15， 魅力 9

Base Atk +2；CMB +7；CMD 21

专长 Dodge， Improved Initiative

技能 察觉 +6，Stealth +7，Swim +16；种族调整 +4 Stealth

环境 temperate or warm swamps or water

组织 solitary，pair，or school（3–7）

宝物 none

Ambush Attack（Ex）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.

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.