Charonoid

Biology
The Charonoids are a race of body-swappers. When they are in another body, the new body's eyes glow red. They are also easy to catch in forcefields (also when in true form).

Unknown Year
The Eleventh Doctor mentioned in a Prison ship that he had encountered the Charanoids before. (It must have been quite a while ago as he couldn't remember who they were for half of DWA:About Face.

Unknown Year
The Eleventh Doctor and Amy Pond encountered a Charanoid (see The Charonoid Prisoner) on a Prison Ship.

Appearence
Crab-like pincers for hands. Horns on head and a red, bulky uneven line going down the middle of it. Red eyes and a big pair of fangs.

Skills
Can jump great distances and can swap bodies.