| Country | Estonia | Ecosystem | |
| Locality | Gulf of Finland (59°35'N 23°38E) | Depth | 20 m |
| Introduced | Year Intro. | 1992 | |
| Life Stage | not specified | unsexed | |
| Quantitative | 0 | Unit | numbers/m^3 |
| Semi Quantitative | 0 | Unit | numbers/m^3 |
| Qualitative | absent | ||
| Year | 2004 - 2004 | Period | 2001-present |
| Date | 2004-08-01 00:00:00 - 2004-08-31 00:00:00 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | Method | random sampling | |
| Remarks | Abundance recorded for August 2004 (dates assumed). | ||