Family Hydractiniidae Agassiz 1862
Hydrozoa - Hydroida - Hydractiniidae
Parent taxon: Gymnoblastina according to F. M. Bayer et al. 1956
Sister taxon: Oceaniidae
Subtaxa: Cycloporidium Philippinactinia Stromactinia
Type: Hydractinia
Ecology: stationary epifaunal carnivore-suspension feeder
Distribution: there are no occurrences of Hydractiniidae in the database