angustus, Hippocampus Günther [A.] 1870:200 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] Freycinet Harbor, Shark Bay, Western Australia. Syntypes: (several) BMNH 1858.12.27.97-103 (7). •Valid as Hippocampus angustus Günther 1870 -- (Allen & Swainston 1988:46 [ref. 25477] as angustatus, Paxton et al. 1989:421 [ref. 12442], Gomon 1997:250 [ref. 22842], Allen 1997:72 [ref. 23977], Kuiter 1997:72 [ref. 25488], Lourie et al. 1999:73 [ref. 23993], Paulus 1999:2269 [ref. 24794], Hutchins 2001:27 [ref. 25847], Kuiter 2001:335 [ref. 25900], Choo & Liew 2003:271 [ref. 26841], Paxton et al. 2006:825 [ref. 29073], Kuiter 2009:96 [ref. 30404], Lourie 2016:88 [ref. 34505], Lourie et al. 2016:15 [ref. 34632], Hamilton et al. 2016:Supplement 2 [ref. 35615], Short et al. 2019:117 [ref. 36532], Gloerfelt-Tarp & Kailola 2022:111 [ref. 41223]). Current status: Valid as Hippocampus angustus Günther 1870. Syngnathidae: Syngnathinae. Distribution: Eastern Indian Ocean: Shark Bay to Dampier Archipelago (Western Australia). Habitat: marine.