Either of two large marine game fishes(Tetrapturus angustirostris or T.belone)related to the sailfish and marlin, having the upper jaw elongated into a spearlike projection.

• 四鳍旗鱼两种和（四鳍旗鱼属尖吻四鳍旗鱼或针四鳍旗鱼）有亲缘关系的海生鲑鱼类鱼之一，下颔呈矛状伸长并突起