heptagonus, Hippichthys Bleeker [P.] 1849:15 [Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen. v. 22 [8]; ref. 320] Indonesia. Neotype: RMNH 7234. Neotype designated by Dawson 1978:140 [ref. 7026]. •Valid as Hippichthys heptagonus Bleeker 1849 -- (Dawson 1978:136 [ref. 7026], Dawson 1985:98 [ref. 6541], Dawson 1986:282 [ref. 6201], Dawson 1986:452 [ref. 5650], Paxton et al. 1989:420 [ref. 12442], Kawanabe & Mizuno 1989:452 [ref. 25598], Allen 1991:107 [ref. 21090], Talwar & Jhingran 1991:765 [ref. 20764], Kottelat et al. 1993:99 [ref. 23448], Paulus 1999:2271 [ref. 24794], Allen et al. 2000:87 [ref. 27467], Nakabo 2000:524 [ref. 25086], Randall & Lim in Randall & Lim 2000:604 [ref. 25122], Sakai et al. 2001:91 [ref. 25693], Allen et al. 2002:336 [ref. 25930], Nakabo 2002:524 [ref. 26001], Heemstra & Heemstra 2004:141 [ref. 28072], Paxton et al. 2006:823 [ref. 29073], Allen et al. 2008:106 [ref. 30265], Kuiter 2009:277 [ref. 30404], Jenkins & Mailautoka 2010:114 [ref. 30900], Kottelat 2013:303 [ref. 32989], Yoshida et al. 2013:71 [ref. 34464], Fricke et al. 2014:47 [ref. 33932], Miesen et al. 2016:87 [ref. 34492], Hamilton et al. 2016:Supplement 1 [ref. 35615], Keith et al. 2021:46 [ref. 38257], Kurihara et al. 2021:17 [ref. 38825], Moots 2022:462 [ref. 39722], Furuhashi et al. 2023:21 [ref. 40140], Jamandre 2023:176 [ref. 40455]). Current status: Valid as Hippichthys heptagonus Bleeker 1849. Syngnathidae: Syngnathinae. Distribution: Indo-West Pacific: west coast of India east to Philippines and Solomon Islands, north to Ryukyu Islands (Japan) and Miyazaki Prefecture (southern Japan). Habitat: freshwater, brackish.