Sunflower
| Name | Sunflower |
| Type | Fishing vessel (smack) |
| GRT | 60 tons |
| Country |  British |
| Built | 1904 |
| Builder | ?, Rye |
| Operator | Walter Shipp, Lowestoft |
| History | Fishing registration: LT 536 |
U-boat attacks on Fishing vessel (smack) Sunflower
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Aug 1915 | UB 5 (Wilhelm Smiths) | Sunk | Stopped and scuttled 30 miles ExN of Lowestoft | 0 |
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