Igneous Crustacean is a deadly creature located in The Shield region of the Wushanko Isles.
In one of the The Forgotten Scrolls voyages, the Whaler must deal with the Igneous Crustacean, who is protecting a piece of a forgotten scroll.
- ^ The Forgotten Scrolls, RuneScape. "The Whaler has tracked down a rare piece of a forgotten scroll. However it is protected by the deadly Igneous Crustacean. His prowess at battling sea creatures will be essential for success."