Robuta

https://marinespecies.org/hydrozoa/aphia.php/api-docs/css/aphia.php?p=taxdetails&id=284122

Hydrozoa - The World Hydrozoa Database - Gymnangium ferlusi (Billard, 1901)

hydrozoa world database gymnangium billard

https://marinespecies.org/hydrozoa/aphia.php?p=taxdetails&id=1749167

Hydrozoa - The World Hydrozoa Database - Gymnangium ilicistomum (Bale, 1882)

hydrozoa world database gymnangium bale

https://www.marinespecies.org/aphia.php?p=taxdetails&id=558860

WoRMS - World Register of Marine Species - Gymnangium superbe (Bale, 1882)

marine species worms world register gymnangium

https://marinespecies.org/hydrozoa/aphia.php?p=taxdetails&id=284121

Hydrozoa - The World Hydrozoa Database - Gymnangium exsertum (Millard, 1962)

hydrozoa world database gymnangium millard