| Country | Japan | Ecosystem | |
| Locality | Tokyo Bay | Depth | 2 m |
| Introduced | Year Intro. | ||
| Life Stage | adult | unsexed | medusa |
| Quantitative | 0.022 | Unit | numbers/m^3 |
| Semi Quantitative | <100 | Unit | numbers/m^3 |
| Qualitative | rare | ||
| Year | 1992 - 1992 | Period | 1975-2000 |
| Date | 1992-03-07 00:00:00 - 1992-03-07 00:00:00 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | Method | volumetric | |
| Remarks | Group probably over wintered. Abundance increased by 0.02 indiv/m^3 due to newly recruited groups. Obtained using horizontal hauls carried out for 3 to 5 minutes at 1 to 2 meters in depth. | ||