Gnathopogon is a genus of freshwater ray-finned fish belonging to the family Gobionidae, the gudgeons. The fishes in this genus are found in eastern Asia.
Species Gnathopogon has the following species. Gnathopogon caerulescens (Sauvage, 1883) Gnathopogon elongatus (Temminck & Schlegel, 1846) Gnathopogon herzensteini (Günther, 1896) Gnathopogon imberbis (Sauvage & Dabry de Thiersant, 1874) Gnathopogon mantschuricus (Berg, 1914) Gnathopogon nicholsi (P. W. Fang, 1943) Gnathopogon polytaenia (Nichols, 1925) Gnathopogon taeniellus (Nichols, 1925) Gnathopogon tsinanensis (T. Mori, 1928)
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