At any stage, you can move up or down the Taxonomic hierachy of Antarctic/subantarctic species by clicking on any name. Lower level taxon counts are shown in [].
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| Kingdom | Animalia | |
| Phylum | Cnidaria | |
| Class | Hydrozoa | |
| Order | Leptothecata | |
| Family | Haleciidae |
List of all species - see Taxon profile using the number
| Genus ?Halecium | ||||
| ?Halecium cymiforme | Allman | |||
| Genus Halecium | ||||
| Halecium antarcticum | Vanhoffen, 1910 | |||
| Halecium banzare | sp. nov. | |||
| Halecium brevithecum | sp. nov. | |||
| Halecium delicatulum | Coughtrey, 1876 | |||
| Halecium elegantulum | sp. nov. | |||
| Halecium interpolatum | Ritchie, 1907 | |||
| Halecium macrocaulus | sp. nov. | |||
| Halecium ovatum | Totton, 1930 | |||
| Halecium tenellum | Hincks | |||
| Halecium tubatum | sp. nov. | |||
| Genus Hydrodendron | ||||
| Hydrodendron arboreum | (Allman, 1888) | |||