Robuta

https://www.marinespecies.org/aphia.php?p=taxdetails&id=196554

WoRMS - World Register of Marine Species - Chelophyes contorta (Lens & van Riemsdijk, 1908)

marine species worms world register chelophyes

https://marinespecies.org/hydrozoa/aphia.php/api-docs/css/aphia.php?p=taxdetails&id=135417

Hydrozoa - The World Hydrozoa Database - Chelophyes appendiculata (Eschscholtz, 1829)

hydrozoa world database chelophyes appendiculata