Ectonurites seem to be part of a hive mind, which is as dark as the world they live on. This mind is embedded in the very fabric of their being, and even a single strand of DNA can replicate it in its entirety. Ectonurites are perhaps the most frightening creatures in the galaxy. With an exposed and upside-down skull for a head, only one eye, dark blue skin, exposed bones on certain parts of their bodies, and blue claws, Ectonurites seem as if they belong in a horror film. Like any ghost, Ectonurites can phase through walls and make themselves invisible. They can also possess people for limited periods of time. Ectonurites also have powerful psychic abilities such as telepathy and telekinesis, but the extent of these abilities remains unclear. Being creatures of the night, intense light, especially sunlight, renders Ectonurites powerless and can kill them with prolonged exposure. Ectonurites are made of protoplasm.

Ectonurites used their ghost-like abilities to become the rulers of all of the planets in the Anur Belt.