King Sand Crab - OSRS Wiki

​King Sand Crabs are aggressive monsters that look like sandy boulders while disguised, but attack when walked by. They are found inside the Catacombs of Kourend in the south-east section of the dungeon, as well as the Crabclaw Caves found south of the Woodcutting Guild.

Sand Crab, Old School RuneScape Wiki

I've seen crashers, but never to this level : r/2007scape

Catacombs of Kourend, Old School RuneScape Wiki

Crabclaw Isle - OSRS Wiki

Artur Hosidius - OSRS Wiki

Crabclaw Caves - OSRS Wiki

OSRS Sand Crabs Training Guide - How To Get To The Island

Swamp Crab - OSRS Wiki

OSRS Sand Crabs Training Guide - How To Get To The Island

Clue scroll (medium) - OSRS Wiki

King Sand Crab, Old School RuneScape Wiki

Crabclaw Caves - OSRS Wiki

OSRS Sand Crabs Training Guide - How To Get To The Island