Cnidaria Hatschek, 1888 - cnidarians Class Hydrozoa Owen, 1843 Order Hydroida Johnston, 1836 - hydroids see Order Anthoathecatae Family Aequoreidae Eschscholtz, 1829 Genus Aequorea Péron & Lesueur, 1810 Aequorea pensilis (Haeckel, 1879) Cornelius, 1995, nom. protect.