These huge creatures can reach a length of 3 miles in length but are usually just under a mile. Their bodies consist of a mineral based amalgam of silica and metals with rocky exteriors. They project a large magnetic field in front of their gaping maw to take in space dust, debris and gasses and metabolize them to produce heat and a form of ionic propulsion. They travel in groups of no more than twelve and although they have never purposely interfered with Ships, they have presented a navigational hazard. Æther Whale biology produces quantities of Tryolic Phlogisten which has many uses in power systems. The beasts are therefore hunted by æther whalers for this valuable commodity.
Reports from a certain Captain Ahab operating in the asteriod belt reported the existence of a gigantic white specimen but the reports have have not been confirmed by Ætherfleet Command.