Shreetam'tiz
this specially-bred subspecies of the Yuuzhan Vong yammosk was created to emit a powerful signal of interference within the telepathic bands used by yammosks, dhuryams, and other such bio-engineering organisms. This allowed the Yuuzhan Vong to temporarily disrupt the control a yammosk had over starships, or broke the link between a dhuryam and its attendant slaves. The shreeyam'tiz was a large, barrel-shaped creature that existed in a large vat of nutrient fluid, and had to be carried into location by Yuuzhan Vong warriors. The shreeyam'tiz was especially useful during the tizo'pil Yun'tchilat, when the dhuryams had to figure out a way to survive without the help of their slaves.