斜纹犬牙石首鱼为辐鳍鱼纲鲈形目鲈亚目石首鱼科的其中一种，分布于西大西洋区，从加拿大新斯科细亚省至美国佛罗里达州北部海域，本鱼身体上半部灰绿色和下半部银色，背部有小斑点，形成高低起伏的虚线。腹鳍和臀鳍淡黄色其他鳍色淡，有时带有黄色色调。鳃盖内黑，外部可见。口大且斜，下颚突出，上颚具大型犬齿状的牙齿，下巴没有触须或毛孔，背鳍硬棘11枚;背鳍软条25-29枚;臀鳍硬棘2枚;臀鳍软条11-13枚，体长可达70公分，栖息在沿岸及河口区，可做为食用鱼、观赏鱼及游钓鱼。

The weakfish, Cynoscion regalis, is a marine fish of the drum family Sciaenidae.

A medium-large, slender, marine fish, it is found along the east coast of North America. The head and back of this fish are dark brown in color with a greenish tinge. The sides have a faint silvery hue with dusky specks, and the belly is white. The origin of its name is based on the weakness of the mouth muscles, which often cause a hook to tear free, allowing the fish to escape. The weakfish grows to 1 m (3 feet) in length and 9 kg (20 pounds) in weight. It is found along the eastern coast of North America from Nova Scotia, Canada to northern Florida, where it is fished both commercially and recreationally.