| Country | United States (contiguous states) | Ecosystem | |
| Locality | Cape Cod Canal (at 5 m depth) | Depth | |
| Introduced | Year Intro. | ||
| Life Stage | not specified | unsexed | |
| Quantitative | Unit | ||
| Semi Quantitative | Unit | ||
| Qualitative | common | ||
| Year | 1967 - | Period | 1950-1974 |
| Date | 1967-01-01 00:00:00 - 1967-12-31 00:00:00 | Record Type | |
| Record Type | |||
| Seasonal | Method | ||
| Remarks | Abundance observed in 1967, dates assumed. | ||