To attract fish from a distance or from deep water, fresh-cut chunksof chum are hard to beat. The process, called chunking, involves using a small amount of frozen or dried chum as a starter to attract baitfish, which are then caught, cut up, and immediately tossed overboard. This attracts even more baitfish, creating a mix of fresh-cut chum scent and a big school of baitfish. Reef and blue-water species simply cannot ignore the abundance of food. Chunking works especially well on the tunas, but I've also seen wahoo, king mackerel, sailfish, marlin, and dolphinfish lured by this technique.