Ground grain or fish scraps scattered in water to attract fish, used in fishing and chumming to concentrate fish in an area.
Possibly from Cornish or regional English dialects; may relate to 'barley' (the grain) or come from nautical terminology for fish bait and chum.
Fishermen have secret knowledge about what attracts fish—berley (or 'chum') creates an underwater scent trail that fish follow like a dinner bell, and commercial fishing relies on this ancient technique.
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