HMS Otter (1778) was a 14-gun sloop, the former French merchantman Glanure, that the royal Navy captured in 1778 and sold in 1783. She then became the merchantman and slave shipCyclops. The French captured her in December 1795 as she was delivering her third cargo of slaves to the West Indies.
HMS Otter (1805) was an 18-gun sloop launched in 1805. She was used for harbour service from 1814 and was sold in 1828.
HMS Otter (1837) was a wooden paddle packet, previously the GPO vessel Wizard. She was transferred to the Royal Navy in 1837, became a gunvessel in 1854, a tug in 1865, a coal hulk in 1878 and was sold in 1893.