The Lipul were one of the six sentient species that were known to reside on the artificial planet Gemworld, and were known to possess telepathic abilities. They resemble giant jellyfishes who live inside of the marrow of crystals. Their spirit travels the galaxy with a kind of astral projection, which are called "dreamships". In 2172, the Lipuls used their dreamship abilities to send a Coalition crew of Humans and Vulcans on a 29 year mission to locate Gemworld and make first contact with the natives of that world. Of the crew, only Captain T'Milia was still alive as of 2376.