| 參考書目 | Compagno, L.J.V., 1984 |
| 生態系 | North Sea |
| 狀態 | native |
| 豐度 | occasional (usually not seen) |
| 生命期階段 | adults |
| 地區的資料庫 | |
| 附註 | Previously reported to be a summer guest in North Sea/Skagerrak (Ref. 52268, 88171). Considered to be extirpated from the North Sea (Ref. 88919). Threats in Skagerrak/Kattegat: bycatch fisheries, eutrophication, habitat loss (Ref. 83294). Also Ref. 72391. |