Robuta

https://marinespecies.org/hydrozoa/aphia.php/api-docs/css/aphia.php?p=taxdetails&id=284199

Hydrozoa - The World Hydrozoa Database - Macrorhynchia phoenicea (Busk, 1852)

hydrozoa world database macrorhynchia busk

https://marinespecies.org/hydrozoa/aphia.php/api-docs/css/aphia.php?p=taxdetails&id=117304

Hydrozoa - The World Hydrozoa Database - Macrorhynchia clarkei (Nutting, 1900)

hydrozoa world database macrorhynchia nutting