Neelix, partly transformed into a Mylean

The Myleans were a species who occupied a region of space near Talax. They had well-developed sweat glands, and no taste buds, as well as a fused spinal column. They were intolerant of bright light because of their dilated pupils. While they were not known to share a common ancestry with Talaxians, the two species occasionally interbred.

Neelix's great-grandfather was Mylean. His Mylean genes became hyper-stimulated due to a Srivani medical experiment in 2374. (VOY: "Scientific Method")