Guahyba
| Name | Guahyba |
| Type | Steamer |
| GRT | 1,891 tons |
| Country |  Brazilian |
| Built | 1908 |
| Builder | Grangemouth & Greenock Dockyard Co., Ltd., Greenock |
| Operator | Cia. Comercio e Navegação, Rio de Janeiro |
| History |
U-boat attacks on Steamer Guahyba
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 2 Nov 1917 | U 151 (Waldemar Kophamel) | Sunk | off Porto Santo, Cape Verde Islands | Montevideo - Le Havre | hides & coffee |
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