Torrey H.B. (1902). The Hydroida of the Pacific Coast of North America. <em>University of California Publications Zoology.</em> 1: 1-104, pls 1-11., available online athttps://biodiversitylibrary.org/page/29942277 page(s): 49 [details]
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2025). World Hydrozoa Database. Halecium kofoidi Torrey, 1902. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=284740 on 2025-06-09
original descriptionTorrey H.B. (1902). The Hydroida of the Pacific Coast of North America. <em>University of California Publications Zoology.</em> 1: 1-104, pls 1-11., available online athttps://biodiversitylibrary.org/page/29942277 page(s): 49 [details]
basis of recordVervoort, W.; Schuchert, P. & van der Land, J. (2000-2007). as a contribution to UNESCO-IOC Register of Marine Organisms. (look up in IMIS) [details]
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality