Argonite

The Argonites are an alien species that exists in the 41st Millennium.

Biology
Given that their ships were monochromatic, it suggests that the Argonites' vision is not comparable to humans.

Culture
The Argonites are a spacefaring culture, and given their artefacts such as the the Argonite Whistler, a grey rod with a handgrip that when applied with pressure creates tightly focused sonic beams.

Appearances

 * Rogue Trader: Into the Storm (2010)