Vantablack is not a naturally occurring pigment, nor has it been found in alien plants. Vantablack is a synthetic material developed by Surrey NanoSystems, a company based in the United Kingdom. It is composed of tightly packed carbon nanotubes that absorb almost all light, giving it an extremely black appearance. While the idea of alien plants producing such a pigment might be imaginative in science fiction, there is currently no scientific evidence supporting the existence of alien plants or their ability to produce Vantablack.