| Country | Finland | Ecosystem | Baltic Sea |
| Locality | Tvärminne Soological Station | Depth | 30 m |
| Introduced | Year Intro. | ||
| Life Stage | not specified | unsexed | |
| Quantitative | 72 | Unit | numbers/m^2 |
| Semi Quantitative | <100 | Unit | numbers/m^2 |
| Qualitative | common | ||
| Year | 1982 - 1982 | Period | 1975-2000 |
| Date | 1982-08-01 00:00:00 - 1982-08-31 00:00:00 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | not specified | Method | random sampling |
| Remarks | Abundance of 72 ± 11 ind./m^2 observed during August 1982 (dates assumed). Area is between 20 and 40 m depth. | ||