# [Plesiosaurus](3-Mechanics\CLI\bestiary\beast/plesiosaurus-xmm.md)
*Source: Monster Manual (2024) p. 366*
## Animals
Use these stat blocks to represent the creatures they're named for or other similar creatures. For example, the [Panther](3-Mechanics/CLI/bestiary/beast/panther-xmm.md) stat block can also represent a mountain lion, while the [Giant Goat](3-Mechanics/CLI/bestiary/beast/giant-goat-xmm.md) stat block might represent a buffalo. Any of these stat blocks might also serve as fantastical animals with distinctive names and cosmetic details unique to your D&D adventures.
```statblock
"name": "Plesiosaurus (XMM)"
"size": "Large"
"type": "beast"
"subtype": "dinosaur"
"alignment": "Unaligned"
"ac": !!int "13"
"hp": !!int "68"
"hit_dice": "8d10 + 24"
"stats":
- !!int "18"
- !!int "15"
- !!int "16"
- !!int "2"
- !!int "12"
- !!int "5"
"speed": "20 ft., swim 40 ft."
"skillsaves":
"Stealth": !!int "4"
"Perception": !!int "3"
"senses": "passive Perception 13"
"languages": ""
"cr": "2"
"traits":
- "desc": "The plesiosaurus can hold its breath for 1 hour."
"name": "Hold Breath"
"actions":
- "desc": "Melee Attack Roll: +6, reach 10 ft. Hit: 11 (2d6 + 4) Piercing\
\ damage."
"name": "Bite"
"source":
- "XMM"
"image": "3-Mechanics/CLI/bestiary/beast/token/plesiosaurus-xmm.webp"
```
^statblock
## Environment
arctic, underwater