Skviqkank

The Skviqkank are a race of parasitic creatures. They begin their lives as small larva which embed themselves into the brains of a host. Over the month long gestation period the larva slowly hollows out the host's brain cavity and takes over all motor functions and memories. When this stage is complete enzymes are secreted which alter the host physically until the final creature is transformed into an adult Skviqkank.

Although the creatures are sentient, they are seen as vermin and a threat to public health in most star systems.