In 1991, diel changes in foraging activity and dietary composition of haddock (Melanogrammus aeglefinusL.), Norway pout (Trisopterus esmarkiNilsson) and poor-cod (Trisopterus minutusL.) were investigated. The fish were sampled from 14 consecutive trawls over 48 h in two areas, one 75 m, the other 140 m deep on a coastal bank off south-western Norway. Four predator groups were delimited based on length-specific diet composition and diel changes in length distributions: haddock (15.0–25.9 cm), small (11.0–14.9 cm) Norway pount, and large (15.0–19.9 cm) Norway pout and poor-cod (13.0–26.9 cm). Diel variation in dry weight of the stomach was found for all groups except the large Norway pout. In particular, both between-day and between-prey differences in the diel patterns were observed. In July, haddock were eating polychaetes and isopods, mainly in the early morning and from noon until a few hours after sunset. The small norway pout were feeding on copepods, mostly in the middle of the day, while poor-cod were feeding on decapods, isopods and polychaetes mainly at night.