The Asominians were a skinny and lime green coloured species. They only required sleep once every twenty years. An Asominian was on Deep Space 9 in 2370, he was one of the few patrons of Quark's in the early hours of the morning. (DS9 novel: Devil in the Sky)

The Asomians were likely a species native the alpha or beta quadrants, though it's possible they were visiting gamma quadrant natives.