Naineris is a genus of polychaete annelids belonging to the family Orbiniidae. It was first described by Henri Marie Ducrotay de Blainville in 1828. The type species is Nais quadricuspida Fabricius, 1780, currently accepted as Naineris quadricuspida (Fabricius, 1780). The genus has cosmopolitan distribution.

Species found in Australia according to the Australian Faunal directory are:

• Naineris australis Hartman, 1957
• Naineris grubei (Gravier, 1908)
• Naineris laevigata (Grube, 1855)
• Naineris victoriae Day, 1977

IRMNG lists 23 species including that shown in the image and those above (with the exception of N. argentiniensis).

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