後鰭鮭，為輻鰭魚綱胡瓜魚目後鰭鮭科的其中一種，亞熱帶魚類，分佈於西南太平洋新西蘭淡水、半鹹水及海域，體長可達8.6公分，棲息在河川下游及河口及沿海，會進行洄游，生活習性不明。
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參考文獻
- Froese, R. & Pauly, D. (eds.) (2015). Retropinna retropinna. FishBase. Version 2015-09.
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