J. J. Flaherty
| Name | J. J. Flaherty |
| Type | Fishing vessel (sail) |
| GRT | 162 tons |
| Country |  American |
| Built | 1899 |
| Builder | ???, Essex, Mass. |
| Operator | Gordon-Pew Fisheries Co., Glouchester, Mass. |
| History | Wooden schooner. |
U-boat attacks on Fishing vessel (sail) J. J. Flaherty
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 25 Aug 1918 | U 156 (Richard Feldt) | Sunk | Stopped and scuttled 35 miles WSW of St. Pierre, Miquelon | Fishing | 0 |
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