fayae, Sicydium Brock [V. E.] 1942:122, Figs. 1-3 [Stanford Ichthyological Bulletin v. 2 (no. 4); ref. 13196] Northern side of Cleopha Island, Tres Marias group, 21°17'24'N, 106°17'54"W, off western coast of Mexico. Holotype: CAS-SU 36535. Paratypes: CAS-SU 36536 (1). Type catalog: Böhlke 1953:117 [ref. 12291]. •Valid as Sicydium fayae Brock 1942 -- (Hoese in Fischer et al. 1995:1135 [ref. 22829], Van Tassell 2011:145 [ref. 31732], de Lucena et al.2013:1432 [ref. 32517], Parenti 2021:415 [ref. 38603]). Current status: Valid as Sicydium fayae Brock 1942. Oxudercidae: Sicydiinae. Distribution: Eastern Pacific: Mexico [amphidromous]. Habitat: freshwater, brackish, marine.