They can also travel along a standard power transfer beam, and leave traces of anaphasic radiation in their wake. When bonded to a Human, the host's appearance may change, such as a change in the eye color.
Background information Edit
The anaphasic lifeform, in its non-corporeal form, was a computer generated effect (CGI), using for the first time in televised Star Trek the LightWave 3D software (at the time still the software component of the Amiga Video Toaster Suite package, and later on the software package of choice for the Star Trek television franchise), provided by Digital Magic's Joe Conti and Tim McHugh. It was a conscious effort to gain more creative control in contrast to the traditional usage of liquid nitrogen against black velvet, called by Visual Effects Supervisor David Stipes, "an act of God", due to the fact that once employed, getting a good usable shot, using this method, was very much a "luck of the draw" process. (Star Trek: The Next Generation Companion, p. 281) Digital Magic continued to experiment with LightWave 3D software in the remainder of the series, creating, among others, the plasma stream in the later episode "Eye of the Beholder".