Neverita didyma

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Neverita didyma
Neverita didyma.jpg
A live and active individual of Neverita didyma, viewed from above
Neverita didyma 01.JPG
Five views of a shell of Neverita didyma
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Hypsogastropoda
clade Littorinimorpha
Superfamily: Naticoidea
Family: Naticidae
Genus: Neverita
Species: N. didyma
Binomial name
Neverita didyma
(Röding, 1798)
  • Albula didyma Röding, 1798
  • Glossaulax didyma (Röding, 1798)
  • Natica ampla Iwakawa, 1900
  • Natica chemnitzii Récluz in Chenu, 1843 (doubtful synonym)
  • Natica didyma (Röding, 1798)
  • Natica glaucina Lamarck, J.B.P.A. de, 1822
  • Natica lamarckiana Reeve, L.A., 1855
  • Natica petiveriana Récluz, C. in Chenu, J.C., 1843
  • Natica problematica Reeve, L.A., 1855
  • Natica robusta Dunker, R.W., 1860
  • Neverita bicolor Philippi, 1849
  • Neverita didyma (Röding, 1798)
  • Polinices didyma (Röding, 1798)
  • Polinices ephebus Hedley, 1915
  • Polinices papyracea Busch, von dem in Philippi, R.A., 1845
  • Polinices (Glossaulax) aulacoglossa Pilsbry, H.A. & E.G. Vanatta, 1908, "1909"
  • Polinices (Glossaulax) ephebus Hedley, C., 1915
50 second video of snails (most likely Neverita didyma and Cerithium muscarum) feeding on the sea floor in the Sea of Cortez, Puerto Peñasco, Mexico

Neverita didyma, common name the bladder moon snail, is a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails.[1]

Egg mass


  • Neverita didyma ampla (Philippi, 1849)
  • Neverita didyma hayashii (Azuma, 1961)
  • Neverita didyma hosoyai (Kira, 1959)


The size of an adult shell of this species varies between 20 mm and 90 mm. Like all naticids, this species is a carnivore and a predator.


This marine species is found in the Indian Ocean off the coasts of Madagascar, Mozambique and South Africa.


  1. ^ a b Neverita didyma (Röding, 1798) . WoRMS (2009). Neverita didyma (Röding, 1798) 5. Accessed through the World Register of Marine Species at on 14 April 2011.
  • Dautzenberg, Ph. (1929). Mollusques testacés marins de Madagascar. Faune des Colonies Francaises, Tome III
  • MacNae, W. & M. Kalk (eds) (1958). A natural history of Inhaca Island, Mozambique. Witwatersrand Univ. Press, Johannesburg. I-iv, 163 pp.
  • Branch, G.M. et al. (2002). Two Oceans. 5th impression. David Philip, Cate Town & Johannesburg
  • Kilburn, R.N. & Rippey, E. (1982) Sea Shells of Southern Africa. Macmillan South Africa, Johannesburg, xi + 249 pp. page(s): 71
  • Steyn, D.G. & Lussi, M. (1998) Marine Shells of South Africa. An Illustrated Collector’s Guide to Beached Shells. Ekogilde Publishers, Hartebeespoort, South Africa, ii + 264 pp. page(s): 50
  • Hollman M. (2008) Naticidae. In Poppe G.T. (ed.) Philippine marine mollusks, vol. 1: 482-501, pls 186-195. Hackenheim: Conchbooks.
  • Torigoe K. & Inaba A. (2011) Revision on the classification of Recent Naticidae. Bulletin of the Nishinomiya Shell Museum 7: 133 + 15 pp., 4 pls

External links[edit]