arnei, Hippocampus Roule [L.] 1916:383 [Bulletin du Muséum National d'Histoire Naturelle (Série 1) v. 22 (no. 7); ref. 20276] Mekong River, near Khemmarat on the Laos - Thailand border [South China Sea]. Syntypes: (2) identified by Lourie et al. (1999:165) as 2 separate species. Hippocampus arnei is a corrected name for Hippocampus aimei Roule, changed due to a typographical error in the original description [ref. 15066]. •Valid as Hippocampus arnei Roule 1916 -- (Kuiter 2009:98 [ref. 30404]). •Not available, possible a joke played on Roule or on the collector -- (Kottelat 2013:305 [ref. 32989]). •In the synonymy of Hippocampus barbouri Jordan & Richardson 1908 -- (Lourie et al. 1999:75 [ref. 23993], Lourie et al. 2016:16 [ref. 34632] in part). •Synonym of Hippocampus spinosissimus Weber 1913 -- (Lourie et al. 2016:40 [ref. 34632] in part). Current status: Synonym of Hippocampus spinosissimus Weber 1913. Syngnathidae: Syngnathinae. Habitat: brackish, marine.