Complex sentence: It chases down pelagic fishes such as lancet fish, mackerel, pilchards, herring, and sauries, and forages near the bottom for groundfishes such as cod, hake, icefish, dories, sand lances, lumpsuckers, and flatfish.
Split into simpler sentences: It chases down pelagic fishes such as lancet fish, mackerel, pilchards, herring, and sauries. It forages near the bottom for groundfishes such as cod, hake, icefish, dories, sand lances, lumpsuckers, and flatfish.