A minor race of traders that rome the galaxy. They are not particulary advanced. They trade a number of differant goods, many sell trinkets of varying kinds. The Yeerks acquired a Pemalite crystal from a Dayang trader who did not know what he had.
The Dayang posses too small of a brain and ear cannal to accommodate a Yeerk parasite, making them a class 1 species. Since they are no threat to the Yeerk empire, they are allowed to continue their trading opperations for the most part in Yeerk space.