Analysis of the contents of 3-479 stomachs of half-fin anchovy (taken monthly from April 1982 to May 1983 from the Bohai Sea) shows that half fin anchovy is a zooplanktivorous fish ; the young fish feeds mainly on Copepoda while the adult fish feeds mainly on Mysidacea and Acetes chinensk ; the food composition has a seasonal change, the main food is Mysidacea in spring but Acetes chinensk in summer and fall; the feeding intensity is closely related to its spawning. Analysis of the contents of 3-479 stomachs of half-fin anchovy (taken from April 1982 to May 1983 from the Bohai Sea) shows that half fin anchovy is a zooplanktivorous fish; the young fish feeds mainly on Copepoda while the adult fish feeds mainly on Mysidacea and Acetes chinensk; the food composition has a seasonal change, the main food is Mysidacea in spring but Acetes chinensk in summer and fall; the feeding intensity is closely related to its spawning.