鲣（拼音：jiān；学名：Katsuwonus pelamis），又称正鲣、烟仔、小串、柴鱼，为辐鳍鱼纲鲈形目鲭亚目鲭科的其中一种。

本鱼分布于全球各大洋的温暖海域。

The skipjack tuna, Katsuwonus pelamis, is a medium-sized perciform fish in the tuna family, Scombridae. It is otherwise known as the aku, arctic bonito, mushmouth, oceanic bonito, striped tuna, or victor fish. It grows up to 1 m (3 ft) in length. It is a cosmopolitan pelagic fish found in tropical and warm-temperate waters. It is a very important species for fisheries.