| Main Ref. | Bartley, D.M. (comp./ed.), 2006 |
| To | United States of America |
| FAO area | |
| From | unknown |
| FAO area | |
| Year | 1992 |
| Range | |
| Period | 1975-present |
| Established in the Wild | yes, self reproducing |
| Established in Aquaculture | |
| Significant Ecological Interactions | unknown |
| Significant Socio-economic Effects | |
| Introduced by | other introducer |
| Reason | ballast water |
| Other Reason | |
| Comments | It is believed to be a ballast waters introduction (National Report to ICES, 1994). Other information (from Mills & Sommer, 1995): this hydrozoan species, believed to be native to the Black Sea and resident in a variety of estuarine habitats worldwide. |