Haaken

The Haaken were a race which were long ago held captive by the Ancients, but were released by Anubis while he was rising power in order to distract the Tau'ri so that he could find an artifact of great power before they were able to stop him.

Behind the scenes
As the Haaken only originate in the unreleased computer game, Stargate SG-1: The Alliance, it is unclear as to what their status is in Stargate canon. As the game was originally meant to be canon, it's entirely possible that the race is also but, as it was cancelled, there is also the possibility that they are in fact non-canon.