Mamelena Xii
| Name | Mamelena Xii |
| Type | Trawler |
| GRT | 111 tons |
| Country |  Spanish |
| Built | |
| Builder | |
| Operator | Soc. Anon Mamelena, San Sebastian |
| History |
U-boat attacks on Trawler Mamelena Xii
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 4 May 1917 | UC 72 (Ernst Voigt) | Sunk | Stopped and scuttled SW of the Contis LH, Biscay |
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