| Country | Poland | Ecosystem | Baltic Sea |
| Locality | Baltic Sea (55°43'N 18°13E) | Depth | 20 m |
| Introduced | Year Intro. | 1995 | |
| Life Stage | not specified | unsexed | |
| Quantitative | 90 | Unit | numbers/m^3 |
| Semi Quantitative | <100 | Unit | numbers/m^3 |
| Qualitative | very common | ||
| Year | 1999 - 1999 | Period | 1975-2000 |
| Date | 1999-08-01 00:00:00 - 1999-08-31 00:00:00 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | Method | random sampling | |
| Remarks | Abundance recorded for August 1999 (dates assumed). | ||