The Réunion seahorse (Hippocampus borboniensis) is a synonym of Hippocampus kuda, Weber, 1913.Lourie, S. A., R.A. Pollom and S.J. Foster, 2016. A global revision of the seahorses Hippocampus Rafinesque 1810 (Actinopterygii: Syngnathiformes): taxonomy and biogeography with recommendations for further research. Zootaxa, 4146(1):1-66. It is found in Madagascar, Mauritius, Mozambique, Réunion, South Africa, and Tanzania. Its natural habitat is subtidal aquatic beds. It is threatened by habitat loss.
Sources
Project Seahorse 2003. Hippocampus borboniensis. 2006 IUCN Red List of Threatened Species. Downloaded on 4 August 2007.