A seahorse is a marine fish belonging to the genus Hippocampus.
Seahorse or seahorses may also refer to:
Science and technology Hippopotamus, which was often called a seahorse in the mid-nineteenth century Seahorse (software), a GNOME front-end application for storing passwords and cryptographic keys
Arts and entertainment Seahorse (2019 film), a British documentary film directed by Jeanie Finlay Seahorse (2026 film), a Canadian drama film directed by Aisha Evelyna The Seahorses, a British rock band Sea Horses (novel), a 1925 novel by Francis Brett Young Sea Horses (film), a 1926 American silent drama film, based on the novel The Sea Horse, a 1974 off-Broadway play by Edward J. Moore; see Royal Manitoba Theatre Centre production history "Seahorses", an episode of the television series Teletubbies Sea Horse Baian, a fictional character in the manga Saint Seiya (aka Knights of the Zodiac) Sea-Horse (folktale), a folktale from Syria
Military USS Seahorse, several United States Navy ships HMS Seahorse, several Royal Navy ships F. F. E. Yeo-Thomas (1902–1964), S.O.E. operative had "SEAHORSE" as a code name during World War II Seahorse, various versions of the Sikorsky H-34 military helicopter Sea Horse, a merchant ship in the wrecking of the Sea Horse, Boadicea and Lord Melville in 1816
Transport Seahorse (HBC vessel, 1734), operated by the HBC from 1734-1764, see Hudson's Bay Company vessels Seahorse (HBC vessel, 1765), operated by the HBC from 1765-1781, see Hudson's Bay Company vessels Seahorse (HBC vessel, 1782), operated by the HBC from 1782-1792, see Hudson's Bay Company vessels
Other uses Hippocampus (mythology) or sea-horse, a mythological creature depicted as a horse in its forepart with a fish-like hindquarter King George V Seahorses, a set of British postage stamps Sea Horse (restaurant), a restaurant in Helsinki, Finland Sea Horse Hotel, a pub in York, England
See also Walrus Battle of Mount Austen, the Galloping Horse, and the Sea Horse, an engagement between United States and Imperial Japanese forces Water horse, any of several mythical creatures