ARCTURUS

Planet or origin: It is not known if the name of the species related to the star known to humans as Arcturus.
The arcturus are non humanoid multi-strand organisms with a roughly skull shaped mass with two eyes at its center. They cannot survive in Earth-like environments, unless immersed in a container filled with their native life fluids. They often have such containers equipped with traction unit to move around on alien worlds. They have developed an advanced space faring civilisation and, in the future, will be members of the same Federation as Earth and Alpha Centauri.
Source: Doctor Who, 'The Curse of Peladon", "The Beast of Peladon"