Yammosk

Yammosks are Yuuzhan Vong creatures mainly used as coordinators during battles to send orders to other space crafts, essentially the many coralskippers, to optimize their actions. Their way of communication is gravitational waves. This was discovered by Danni Quee to locate yammosks in capital ships, and therefore target them during battles. Later it became possible to jam the yammosk's communication, lessening dramatically the efficiency of affected Yuuzhan Vong fleets.

Some yammosks are used instead as "world coordinators." They manage the thousands of biological processes that go into terraforming and maintaing Yuuzhan Vong worlds. Because these yammosks must be of the highest quality, they are selected through a special process. Multiple yammosks are colocated, and each is given a contingent of slaves to influence. When one yammosk has destroyed all of its siblings, it assumes control over the new Vong world.

Yuuzhan Vong biotechnology is generally not self-aware, but yammosks are posess at least partially sentient. Physically, yammosks resemble huge brains, kept in vats, which trail thousands of digusting tentacles. Each yammosk is carefully protected and pampered - often slaves are confined in a yammosk vat with orders to massage its tentacles. This provides the yammosk with companionship but is a terrifying experience for the slaves, because the yammosk can mentally manipulate and communicate with them. Vong generals develop a rapport with their yammosks, allowing them to give commands in battle. The yammosk then psychically (via gravitic waves) influences the minds of all Vong combattants within range.