Animal · 12 hexes · SM +5 Elasmosaurus [Monsters on Automatic, SRD coverage: dinosaurs and prehistoric beasts; answers Elasmosaurus (SRD 3.5)]
Fourteen metres, and eight of them are neck. It swims under a boat and comes up alongside, and the head arrives from a direction nobody was watching. The body is barely a threat; the reach is the entire animal, and there is no useful distance from it short of shore.
Attributes
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
- GCS ancestry draft: gcs/elasmosaurus.gct
- Independent build total: -3 points of racial traits plus 6 points of racial skills.
- Answers the SRD heading(s): Elasmosaurus (SRD 3.5). Only the creature identity is taken from the SRD; the GURPS statistics, ratings and prose are this project's own work and reproduce no SRD text.
- Typical Stats, damage and ratings are derived from the racial template, not authored beside it, so the sheet and the stat block cannot disagree.
- Body mass used to scale this build: 2000 kg. ST, Size Modifier and DR are checked against it; see the gurps-animal-sanity-check skill for the bands.
- Movement: ground Move 6; water Move 6, 9 at a sprint (primary). The published Move is the primary medium's cruising Move; sprint figures are stated here and not folded into it.
- Treasure and grappling are not authored for this batch and ship as explicit nulls; `lair` carries a short habitat note, because where a wandering animal dens is an encounter fact rather than a loot one.
- Fourteen metres, 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.
Encounter rating
Tags
- monsters-on-automatic
- ai-generated
- doa-authored
- srd-3-5
- animal
- reptile
- dinosaur
- aquatic
- predator
- prehistoric
- open-water
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.
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.

