南非砂鰕虎鱼(学名:Psammogobius knysnaensis),为辐鳍鱼纲鲈形目鰕虎亚目鰕虎科砂鰕虎鱼属下的一个种,为亚热带鱼类,分布于南非海域及半咸水域,本鱼体灰色至褐色,背部伴随著白色及褐色斑点,体侧具白色细纹,背鳍硬棘7枚;背鳍软条9-10枚;臀鳍硬棘1枚;臀鳍软条9-11枚,体长可达7公分,栖息在河口区及受潮汐影响的溪流,生活习性不明。
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