Vishnans
From FreeSpace Wiki
The Vishnans are a species featured in the first Blue Planet campaign, Age of Aquarius.
The nature of the Vishnans is not fully understood, but they appear to be 'Great Preservers', counterparts to the Shivans in their role as the Great Destroyers.
Notes
Darius, the campaign creator, used reskinned and renamed Ancient shipmodels from Inferno: Release 1 to represent the Vishnans. Subsequent releases used higher-detail versions of the same models created by the Ancient-Shivan War project.