ABSTRA CT. Diet of Scomber [aponicus was investigated from stomach contents of fish caught by purse-seine nets using light during th e fishing season which lasted from March to November 1994 in 'the Egyptian Mediterranean , off Alexandria. Stomachs of 114 fish (150-350 rnrn in total length) were examined. Food items were evaluated as percentages by occurrence. weight and relative importance. The major food items were pisces. crustaceans and annelids. Minor food items included molluscs. echinoderms. insects and ascidians. Feeding variation in relation to size and season were studied. Small fish consumed mostly fish fry while the larger individuals fed mostly on fish and shrimps. S. [aponicus fed mainly on fishes in summer whereas it consumed a variety of cru staceans and annelids in spring. Stomach fullness was higher in autumn than in other seasons. The ob served prey items taken by chub mackerel allow this predator to be considered as omnivorous.