Rhizostomatidae

Rhizostomatidae is a family of cnidarians in the class Scyphozoa.

Genera and species
According to the World Register of Marine Species, 11 extant species are in four extant genera within this family:
 * Genus Eupilema
 * Eupilema inexpectata Pages, Gili & Bouillon, 1992
 * Genus Nemopilema
 * Nemopilema nomurai Kishinouye, 1922
 * Rhizostoma octopus.jpg]]Genus Rhizostoma Cuvier, 1800
 * Rhizostoma luteum (Quoy & Gaimard, 1827)
 * Rhizostoma octopus (Linnaeus, 1758)
 * Rhizostoma pulmo (Macri, 1778)
 * Genus Rhopilema Haeckel, 1880
 * Rhopilema esculentum Kishinouye, 1891
 * Rhopilema hispidum
 * Rhopilema nomadica
 * Rhopilema rhopalophora (Haeckel)
 * Rhopilema rhopalophorum Haeckel, 1880
 * Rhopilema verrilli

Extinct taxa

 * Genus †Essexella
 * Genus †Simplicibrachia, is known from fossils in the Ypresian-aged Monte Bolca lagerstatten.