Cetus

Cetus was an Asuran, serving under Talus during the Asuran assault on Atlantis. When Jack O'Neill and Richard Woolsey were captured, Cetus probed Woolsey's mind for whatever information he held. Once the Asurans had repaired the damage to Atlantis, Cetus activated the shield in preparation for Atlantis' journey to Asuras. However, Atlantis 1 had rigged the shield emitters with Disruptor crystals that resulted in a disruption wave spreading through the city, destroy Cetus and the other Asurans.