The marsh-gunnies were diminutive beings that originated from Nim Drovis, a planet situated within the Meridian sector of the Outer Rim Territories. These creatures inhabited the bayous, swamps, and marshes found on Nim Drovis. During 13 ABY, when the droids C-3PO and R2-D2, accompanied by starship captain Bortrek, made their arrival on the planet, their designated landing area was encompassed by marshlands teeming with marsh-gunnies, gulpers as well as green-eyed wadie-platts.
Barbara Hambly conceived of the marsh-gunnies for her book, Planet of Twilight, which was released by Bantam Spectra in the year 1997.