This is the first record of the Pacific seahorse Hippocampus ingens at a northern oceanic island from the eastern Pacific Ocean. The photographic record of the juvenile female H. ingens was made in November 2015 during a cage diving trip at Guadalupe Island, Mexico. The presence of H. ingens in this area could be related to long distance dispersal mechanisms, as has been observed in other species of seahorses.
Keywords: Syngnathidae; biosphere reserve; oceanic island; pelagic environment; range extension.
© 2018 The Fisheries Society of the British Isles.