SRD
Plesiosaurus
Large beast, unaligned
Armor Class 13 (natural armor)
Hit Points 68 8d10+24
Speed
20ft
Swim: 40ft
Skills Perception +3, Stealth +4
Senses passive Perception 13
Challenge 2 (450 XP)
Hold Breath. The plesiosaurus can hold its breath for 1 hour.
Actions
Bite. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 14 3d6+4 piercing damage.