| Country | United States (contiguous states) | Ecosystem | |
| Locality | Penobscot Bay, Maine | Depth | |
| Introduced | Year Intro. | ||
| Life Stage | larvae | unsexed | |
| Quantitative | 0.00366 | Unit | numbers/m3 |
| Semi Quantitative | <100 | Unit | numbers/m3 |
| Qualitative | very common | ||
| Year | 1998 - 1998 | Period | 1975-2000 |
| Date | 18/03/98 - 30/04/98 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | not specified | Method | swept area |
| Remarks | Four one- or two-day cruises were conducted twice a week. A 1.0 m 333-micron mesh plankton net equipped with a General Oceanics flowmeter during daylight hours was utilized. It was hauled for 20 minutes in stepped oblique fashion at the surface, at 10 m, and at 20 m or to within 5 m of the bottom. | ||