Schuchert, P.; Cartwright, P.; Choong, H.; Galea, H. (2025). World Hydrozoa Database.
Halecium gracile Bale, 1893. Accessed through: RAS (Eds.) (2025) Register of Antarctic Species at: https://ras.biodiversity.aq/aphia.php?p=taxdetails&id=174384 on 2025-09-12
RAS (Eds.) (2025). Register of Antarctic Species.
Halecium gracile Bale, 1893. Accessed at: https://ras.biodiversity.aq/aphia.php/www.pfeil-verlag.de/04biol/www.pfeil-verlag.de/04biol/aphia.php?p=taxdetails&id=174384 on 2025-09-12