为了解上海市市售海鱼异尖线虫幼虫感染情况，2022年在上海市农贸市场、超市和海鲜市场中采集自东海海域捕捞的新鲜海鱼，解剖后分别在内脏和鱼肉中查找疑似异尖线虫的虫体，分别置于光学显微镜和扫描电子显微镜下进行观察，分析海鱼的异尖线虫感染情况。共采集海鱼16种338尾，从6种116尾体内检出异尖线虫1 065条，总感染率为34.3%（116/338），平均感染度为9.2条/尾。其中鮟鱇鱼的感染率最高（11/12），小黄鱼的感染度最高（13.0条/尾）。海鱼异尖线虫感染率从春季到冬季逐渐升高，冬季的感染率和感染度最高，分别为51.1%（46/90）和12.3条/尾。异尖线虫寄生的主要部位是海鱼的肠道和腹腔，分别占检出异尖线虫总数的54.6%（582/1 065）和40.7%（433/1 065）。本研究结果提示，上海市市售海鱼存在异尖线虫幼虫感染，感染率较高的鱼种有鮟鱇鱼、小黄鱼等常见食用海鱼。

To understand the Anisakis larvae infection status in marine fishes sold in Shanghai, the fresh marine fishes caught in the East China Sea area were collected from Farmers’ markets, supermarkets and seafood markets in Shanghai in 2022. The suspected Anisakis larvae were searched in the offal and muscles after dissection and observed under optical microscope and scanning electron microscope, respectively. A total of 338 marine fish of 16 species were collected, and 1 065 Anisakis larvae were found from 116 fish of 6 species, with a total infection rate of 34.3% (116/338) and average infection intensity of 9.2 larvae/fish. The highest infection rate was 11/12 in Lophiiformes, and the highest average infection intensity was 13.0 larvae/fish in Larimichthys polyactis. The Anisakis larvae infection rates increased gradually from spring to winter. The infection rate and average infection intensity in winter were 51.1% (46/90) and 12.3 larvae/fish, respectively, which were the highest seasons of the year. The predominant sites of Anisakis larvae parasitise in marine fishes were the intestines and abdominal cavity, with infection rates of 54.6% (582/1 065) and 40.7% (433/1 065), respectively. The result showed that Anisakis larvae infections were present in marine fish sold in Shanghai and the infection rates of commonly consumed marine fishes such as Lophiiformes and L. polyactis were high.