Retropinna
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Osmeriformes
Family:	Retropinnidae
Genus:	Retropinna T. N. Gill, 1862

Retropinna is a genus in the family Retropinnidae containing one species that is widespread in southeastern Australia, one from Tasmania and one from New Zealand.

Species

There are currently three recognized species in this genus:^[1]

• Retropinna retropinna (J. Richardson, 1848) (Cucumberfish, New Zealand smelt)
• Retropinna semoni (M. C. W. Weber, 1895) (Australian smelt)
• Retropinna tasmanica McCulloch, 1920 (Tasmanian smelt)