Giant Crab - Dungeons on Automatic Bestiary

Animal · 1 hex · SM +0 Giant Crab (Monsters on Automatic; answers SRD 5.1)

A crab the size of a war shield, clattering out of the surf onto stone. The shell shrugs off a sword cut and the claws will take a hand off at the wrist. It is slow and stupid, and coming at it from the front is still a poor idea.

Attributes

ST15

DX11

IQ3

HT12

HP15

Will8

Per9

FP12

Basic Speed5.75

Basic Move5

Dodge8

DR5

Melee attacks

Usage	Level	Damage	Reach
PincerPincer (12): 1d cutting, Reach C. Takes hold and does not open again while the crab lives. Cannot parry.	12	1d cutting	C

Traits (10)

Amphibious
Bestial
Cannot Speak
Cold-Blooded
Damage Resistance 5
Extra Legs (Eight Legs)
Horizontal
No Fine Manipulators
Pressure Support 1
Sharp Claws (Pincers)

Skills (2)

12Brawling
12Stealth

Notes

Racial cost: -33 points of traits plus 6 points of skills.
Body weight: 250 lb.
Movement: ground Move 5 (primary); water Move 5.

Encounter rating

CER18

Offense8

Protection10

Threat tierminor

Appearing2

Wandering4

GCS v5 downloads

Where this one came from

Source record: Giant Crab [Monsters on Automatic, SRD coverage: mundane birds, fish and aquatic animals]
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): Giant Crab (SRD 5.1).
Racial template: -33 points across 16 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/giant-crab.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.
About seven feet across the leg span, which is the SM 0 row.
ST raised from an earlier draft: Basic Lift has to cover dragging a body back to the water, which is the thing the creature is for.
DR is full armor: a carapace is shell, not hide.

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.