Turritopsis

Turritopsis is a genus of hydrozoans in the family Oceaniidae.

Turritopsis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Cnidaria
Class:	Hydrozoa
Order:	Anthoathecata
Family:	Oceaniidae
Genus:	Turritopsis McCrady, 1857[1]
Species
See text
Synonyms
Clavula Wright, 1859 Dendroclava Weismann, 1883

Species

According to the World Register of Marine Species, this genus includes the following species:^[2]

• Turritopsis chevalense (Thorneley, 1904) – species inquirenda
• Turritopsis dohrnii (Weismann, 1883) also known as the "Benjamin Button jellyfish", or the "immortal jellyfish". It can reverse its life cycle and transform itself back to a polyp.^[3]
• Turritopsis fascicularis Fraser, 1943
• Turritopsis lata Lendenfeld, 1884
• Turritopsis minor (Nutting, 1905)
• Turritopsis nutricula McCrady, 1857 (several species, including the "immortal jellyfish", were formerly classified as T. nutricula)^[4]
• Turritopsis pacifica Maas, 1909
• Turritopsis pleurostoma (Péron & Lesueur, 1809) – species inquirenda
• Turritopsis polycirrha (Keferstein, 1862)
• Turritopsis rubra Farquhar, 1895