Foa is a genus of fishes in the family Apogonidae, the cardinalfishes, native to the Indian and Pacific Oceans.

Species The recognized species in this genus are: Foa brachygramma (O. P. Jenkins, 1903) (weed cardinalfish) Foa fo D. S. Jordan & Seale, 1905 (weedy cardinalfish) Foa hyalina (H. M. Smith & Radcliffe, 1912) (hyaline cardinalfish) Foa landoni (Herre, 1934) Foa leisi T. H. Fraser & J. E. Randall, 2011 Foa longimana M. C. W. Weber, 1909 Foa madagascariensis Petit, 1931 Foa nivosa T. H. Fraser & J. E. Randall, 2011 Foa winterbottomi T. H. Fraser, 2020 Foa yamba T. H. Fraser, 2014 (Yamba cardinalfish)

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