The GB Grand Master Krakatoa zoa is a true collectors piece. The Grandmaster Krak has intense red and violet center that fades into a green oval disk, with skirt that looks like it was dusted with red paint like splatter. It have a medium growth rate and is of medium hardiness though it is sensitive to drastic changes in water quality. These guys enjoy medium lighting and low flow. It also respond really well to being fed on occasion.