IreniumIrenium is a genus of hydrozoans in the family Eirenidae.SpeciesThe genus contains the following species:Irenium alabiatum Zamponi, Suárez-Moreales & Gasca, 1999Irenium labiatum Zamponi, Suárez-Moreales & Gasca, 1999Irenium polynemum Huang, Xu & Guo, 2010Irenium quadrigatum Haeckel, 1879Irenium teuscheri Haeckel, 1879