The Shinx are a sapient, commercially-oriented spacefaring species from the planet Shinus. Their skin is red, hairless and jelly-like. A lack of pigmentation around their nostrils may indicate that the individual is suffering a deadly respiratory disease. Their culture includes marriage, but not divorce.
As of the early 21st century, some Shinx were secretly living on Earth, disguised as Humans. The Human appearance is assumed with the help of a device known as the DNA patch. The Doctor describes this species as "economically very successful, and generally a pretty low-key bunch of fellows".