is a species of the class Hydrozoa (Hydralike Animals) in the family Campanulariidae and order Leptothecatae (Thecate Hydroids).
Phialidium ambiguum
Phialidium bicophorum
Phialidium brunescens
Phialidium chengshanense
Phialidium gardineri
Phialidium iridescens
Phialidium languidum
Phialidium malavensis
Phialidium malayense
Phialidium ovale
Phialidium pacificum
Phialidium rangiroae