A Karvesshian is described by Morty (C-132) as a 500-foot lizard and is never seen in the comic. Rick (C-132) and Morty (C-132) went to the dimension where karvesshians live in order to get their hands on Karvesshian Ovary Crystals. Morty was put, by Rick, through the karvesshian's birthing canal in order to retrieve these crystals, which Rick implied to have a huge value on the black marked.