Halopteris is a genus of cnidarians belonging to the family Halopterididae that has a cosmopolitan distribution. The genus was first described in 1877 by Irish naturalist George James Allman, and the type species is Halopteris carinata.

Species:

• Halopteris alternata (Nutting, 1900)

• Halopteris australis Galea, 2018
• Halopteris billardi (Vannucci, 1951)
• Halopteris brasiliensis Galea, 2018
• Halopteris campanula (Busk, 1852)
• Halopteris carinata Allman, 1877
• Halopteris catharina (Johnston, 1833)
• Halopteris clarkei (Nutting, 1900)
• Halopteris concava (Billard, 1911)
• Halopteris crassa (Billard, 1911)
• Halopteris diaphana (Heller, 1868)
• Halopteris diaphragmatica (Billard, 1911)
• Halopteris enersis Galea, 2006
• Halopteris everta (Mulder & Trebilcock, 1909)
• Halopteris filicina (Grateloup) Kützing, 1843
• Halopteris gemellipara Millard, 1962
• Halopteris geminata (Allman, 1877)
• Halopteris glutinosa (Lamouroux, 1816)
• Halopteris infundibulum Vervoort, 1966
• Halopteris jedani (Billard, 1913)
• Halopteris liechtensternii (Marktanner-Turneretscher, 1890)
• Halopteris longibrachia Calder & Faucci, 2021
• Halopteris millardae Galea, 2018
• Halopteris minuta (Trebilcock, 1928)
• Halopteris opposita (Mulder & Trebilcock, 1911)
• Halopteris peculiaris (Billard, 1913)
• Halopteris plagiocampa (Pictet, 1893)
• Halopteris platygonotheca Schuchert, 1997
• Halopteris plumosa Galea & Schories, 2012
• Halopteris polymorpha (Billard, 1913)
• Halopteris prominens Vervoort & Watson, 2003
• Halopteris pseudoconstricta Millard, 1975
• Halopteris rostrata Millard, 1975
• Halopteris schucherti Galea, 2006
• Halopteris simplex (Warren, 1914)
• Halopteris tenella (Verrill, 1874)
• Halopteris tuba (Kirchenpauer, 1876)
• Halopteris urceolata Watson, 2015
• Halopteris vervoorti Galea, 2008
• Halopteris violae Calder, Mallinson, Collins & Hickman, 2003

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