刀魚(學名:Coilia nasus),又稱鳳尾魚、長頜鱭、刀鱭、江鱭、毛鱭、鮆(音同「茲」),為輻鰭魚綱鯡形目鯷科的一種小型溯河洄游性魚類[1],分佈於西北太平洋區,包括日本、韓國、中國的黃海與東海等海域,棲息深度可達50公尺。[2]
本魚從頭向尾部逐漸變細,腹部圓潤,上頷長,幾乎到達胸鰭基部,胸鰭鰭條細長,有6個長的細絲並超過腹鰭,臀鰭長,並與尾鰭相連,尾鰭短小,臀鰭軟條80條,體長可達41公分[2]。
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