Mur’guls are a barely-humanoid race of fish-like creatures from the Warcraft series of computer games. They appear to be a primitive sub-species of Murlocs which had been corrupted by the explosion of the World Tree, similar to the Naga who had once been Elves. While their uncorrupted brethren are often evil enough, Mur’gul are far more so. Mur’guls wear skull like helms and wield shield with a skull theme. They fight with the same weapons as murlocs. In Warcraft 3 they tend to be higher level creeps than murlocs.

Prior to the events of The Frozen Throne, Murlocs themselves had less pronounced fins. This was presumably caused by the explosion of the World Tree, as that was the cause of the Mur’gul’s creation.