Yorik coral

Yorik Coral is the primary shipbuilding material of the Yuuzhan Vong. It is grown on a planet in the form of a ship, and later symbiotic creatures are implanted or grown within it to perform the ship's functions. It absorbs the material it is grown on: rock, unrefined ores, or occasionally wreckage of enemy bunkers or buildings, but also requires organic material. In a completed ship, the yorik coral is run through with the nervous system that controls and coordinates the various biots, as well as a circulatory system that sustains them. Thus, if the yorik coral of a ship sustains enough damage, it will cut of control and sustenance to all of the various subsystems, resulting in loss of efficiency and then total faliure.