The Shansheeth were a species known as galactic undertakers. They traveled through space to return lost heroes to their kin.
Biology
They had a likeness to Earth vultures. They had hunched shoulders with their necks protruding from the middle section of their body. They were able to project an energy beam from their hands offensively. (SJA: Death of the Doctor)
History
In 2010 the Claw Shansheeth of the 15th Funeral Fleet returned the Doctor to Earth, proclaiming him dead. They planned to drain energy from Sarah Jane Smith and Josephine Grant through their memories of the Doctor. The Shansheeth were lying about his death, and the Doctor was actually trapped on a far away planet. He managed to escape through use of Artron energy, before the Shansheeth confronted and attacked him. (SJA: Death of the Doctor)