Elasmosaurus - Dungeons on Automatic Bestiary

Elasmosaurus top-down flat-top hex token

Animal · 12 hexes · SM +5 Elasmosaurus (Monsters on Automatic; answers SRD 3.5)

Forty-five feet of marine reptile, twenty-five of it neck. It swims under a boat and surfaces alongside, and the head arrives from a direction nobody was watching. The body is barely a threat on its own; the reach is the whole animal, and there is no safe distance from it short of dry land.

Attributes

ST45

DX11

IQ3

HT13

HP45

Will9

Per10

FP13

Basic Speed6

Basic Move6

Dodge9

DR2

Melee attacks

Usage	Level	Damage	Reach
BiteBite (13): 5d-1 cutting, Reach C,4. Delivered at the end of a neck longer than the rest of the animal. It can take someone off a deck without the body ever entering the water.	13	5d-1 cutting	C,4

Traits (13)

Amphibious
Bestial
Breath-Holding 3
Cannot Speak
Cold-Blooded
Damage Resistance 2 (Tough Skin)
Enhanced Move 0.5 (Water)
Horizontal
Nictitating Membrane 2
No Fine Manipulators
Pressure Support 1
Restricted Diet (Carnivore)
Sharp Teeth

Skills (2)

13Brawling
14Swimming

Notes

Racial cost: -3 points of traits plus 6 points of skills.
Body weight: 4,400 lb.
Movement: ground Move 6; water Move 6, 9 at a sprint (primary).

Encounter rating

CER72

Offense31

Protection41

Threat tiermajor

Appearing1

Wandering2

GCS v5 downloads

Where this one came from

Source record: Elasmosaurus [Monsters on Automatic, SRD coverage: dinosaurs and prehistoric beasts]
Source system: doa_fixture / doa_authored
Released under: cc_by_4_0
Conversion: 0.1.0-srd-independent-build
Review status: approved
Credit: Monster statistics, ratings and description prose by Monsters on Automatic; AI-generated first draft, project-reviewed, released under CC BY 4.0.
Description: Written by Dungeons on Automatic, released under cc_by_4_0

Independently authored GURPS build. The SRD supplies the creature identity this record answers to and nothing else: no SRD statistics, wording or presentation is reproduced, and no third-party GURPS conversion was used as an input.
Answers the SRD heading(s): Elasmosaurus (SRD 3.5).
Racial template: -3 points across 19 traits, plus 2 racial skill(s) worth 6 points.
Every trait is drawn from the project's controlled GURPS vocabulary in scripts/srd/trait-library.mjs, which carries the page reference and published cost for each entry.
sourceSystem is recorded as doa_fixture because that is the package contract's value for project-authored material; the SRD headings this record answers are in provenance.coversSourceIdentities.
Ratings are recomputed through the consumer CER path on every build, so a mechanics change cannot leave a stale rating behind.
Typical Stats, damage and ratings are derived from the racial template rather than authored beside it, so the sheet and the stat block cannot disagree.
GCS ancestry draft: gcs/elasmosaurus.gct
The published Move is the primary medium's cruising Move; sprint figures are stated in the movement note and not folded into it.
Treasure and grappling are not authored for this record and ship as explicit nulls, which reads as known absent rather than forgotten; `lair` carries a short habitat note instead, because where a creature dens is an encounter fact rather than a loot one.
Body mass is the figure the build was scaled from and the one fact that makes it checkable; see the gurps-animal-sanity-check skill for the bands.
Forty-five feet, which is the SM +5 row — the top of the published table's practical range for a creature at a table.
Reach is the point of the build. The bite is stated at reach C,4 because the neck, not the jaws, is what makes this dangerous.

Copyright 2026 Monsters on Automatic. GURPS-compatible monster statistics, ratings and prose authored for this package as an AI-generated first draft under project review. No SRD text, and no third-party GURPS conversion, is reproduced. Portrait and tokens are AI-generated original art. Sources and credits.