europaeus, Hippocampus Ginsburg [I.] 1933:561 [Journal of the Washington Academy of Sciences v. 23 (no. 12); ref. 16490] La Rochelle, France, Bay of Biscay, northeastern Atlantic. Holotype: USNM 28544. Paratypes: (8) USNM 93217 (2). •Valid as Hippocampus europaeus Ginsburg 1933 -- (Kuiter 2009:66 [ref. 30404]). •Synonym of Hippocampus hippocampus (Linnaeus 1758) -- (Wheeler 1973:278 [ref. 7190], Dawson in Whitehead et al. 1986:630 [ref. 13676], Lourie et al. 1999:99 [ref. 23993], Lourie et al. 2016:27 [ref. 34632]). Current status: Synonym of Hippocampus hippocampus (Linnaeus 1758). Syngnathidae: Syngnathinae. Habitat: brackish, marine.