Halecium is een geslacht van hydroïdpoliepen uit de familie van de Haleciidae.

Soorten 
 Halecium amphibolum Watson, 1993
 Halecium annulatum Torrey, 1902
 Halecium antarcticum Vanhöffen, 1910
 Halecium arcticum Ronowicz & Schuchert, 2007
 Halecium articulosum Clark, 1875
 Halecium banyulense Motz-Kossowska, 1912
 Halecium banzare Watson, 2008
 Halecium beanii (Johnston, 1838)
 Halecium bermudense Congdon, 1907
 Halecium birulai Spassky, 1929
 Halecium bithecum Watson, 2005
 Halecium brashnikowi Linko, 1911
 Halecium brevithecum Watson, 2008
 Halecium bruniensis Watson, 1975
 Halecium calderi Galea, 2010
 Halecium conicum Stechow, 1919
 Halecium corrugatissimum Trebilcock, 1928
 Halecium corrugatum Nutting, 1899
 Halecium crinis Stechow, 1913
 Halecium curvicaule Lorenz, 1886
 Halecium cymiforme Allman, 1888
 Halecium cymosum Fraser, 1935
 Halecium delicatulum Coughtrey, 1876
 Halecium densum Calkins, 1899
 Halecium dichotomum Allman, 1888
 Halecium diminutivum Fraser, 1940
 Halecium dubium Fraser, 1943
 Halecium dufresnae Millard, 1977
 Halecium dyssymetrum Billard, 1929
 Halecium elegantulum Watson, 2008
 Halecium exiguum Fraser, 1948
 Halecium expansum Trebilcock, 1928
 Halecium fasciculatum Fraser, 1938
 Halecium filicula Allman, 1877
 Halecium fjordlandicum Galea, 2007
 Halecium flabellatum Fraser, 1935
 Halecium flexum Fraser, 1948
 Halecium fragile Hodgson, 1950
 Halecium fraseri Ralph, 1958
 Halecium frigidum Peña Cantero, 2010
 Halecium galeatum Billard, 1937
 Halecium groenlandicum Kramp, 1911
 Halecium halecinum (Linnaeus, 1758)
 Halecium harrimani Nutting, 1901
 Halecium humile Pictet, 1893
 Halecium incertus Naumov & Stepanjants, 1962
 Halecium inhacae Millard, 1958
 Halecium insolens Fraser, 1938
 Halecium interpolatum Ritchie, 1907
 Halecium irregulare Bonnevie, 1899
 Halecium jaederholmi Vervoort, 1972
 Halecium kofoidi Torrey, 1902
 Halecium labiatum Billard, 1933
 Halecium labrosum Alder, 1859
 Halecium laeve Kramp, 1932
 Halecium lankesterii (Bourne, 1890)
 Halecium lenticulare Trebilcock, 1928
 Halecium lightbourni Calder, 1991
 Halecium linkoi Antsulevich, 1980
 Halecium liouvillei Billard, 1934
 Halecium lucium Antsulevich, 1979
 Halecium luteum Watson, 1975
 Halecium macrocaulus Watson, 2008
 Halecium macrocephalum Allman, 1877
 Halecium marsupiale Bergh, 1887
 Halecium mediterraneum Weismann, 1883
 Halecium minimum Schneider, 1898
 Halecium minor Fraser, 1935
 Halecium minutum Broch, 1903
 Halecium mirabile Schydlowsky, 1902
 Halecium mirandus Antsulevich & Regel, 1986
 Halecium muricatum (Ellis & Solander, 1786)
 Halecium nanum Alder, 1859
 Halecium nullinodum Fraser, 1935
 Halecium ochotense Linko, 1911
 Halecium ornatum Nutting, 1901
 Halecium ovatum Totton, 1930
 Halecium pallens Jäderholm, 1904
 Halecium paucinodum (Fraser, 1947)
 Halecium pearsonenese Watson, 1997
 Halecium perexiguum Hirohito, 1995
 Halecium petrosum Stechow, 1919
 Halecium planum Bonnevie, 1901
 Halecium plicatocarpum Vervoort & Watson, 2003
 Halecium plumosum Hincks, 1868
 Halecium profundum Calder & Vervoort, 1998
 Halecium pusillum Sars, 1856
 Halecium pyriforme Hirohito, 1995
 Halecium ralpha Watson & Vervoort, 2001
 Halecium reduplicatum (Fraser, 1935)
 Halecium regulare Fraser, 1938
 Halecium repens Jäderholm, 1907
 Halecium reversum Nutting, 1901
 Halecium scalariformis Billard, 1929
 Halecium scutum Clark, 1976
 Halecium secundum Jäderholm, 1904
 Halecium sessile Norman, 1866
 Halecium sibogae Billard, 1929
 Halecium singulare (Billard, 1929)
 Halecium spatulum Watson, 2000
 Halecium speciosum Nutting, 1901
 Halecium tabulatum Watson, 2005
 Halecium telescopicum Allman, 1888
 Halecium tenellum Hincks, 1861
 Halecium tensum Fraser, 1943
 Halecium tenue Fraser, 1938
 Halecium textum Kramp, 1911
 Halecium tortile Bonnevie, 1898
 Halecium tortum Fraser, 1938
 Halecium tubatum Watson, 2008
 Halecium undulatum Billard, 1921
 Halecium vagans Fraser, 1938
 Halecium vasiforme Fraser, 1935
 Halecium washingtoni Nutting, 1901
 Halecium wilsoni Calkins, 1899
 Halecium annuliforme Galea & Schories, 2012

Haleciidae