This is something else fly fisherman are above. Involves use of substance that by its smell when dumped into the water will attract fish to the area. Saltwater flyfishers being less well bred are more likely to practise this. Common ingredients employed are bread, fish scraps, shellfish, dinner leftovers,unwanted sandwiches, stale cake etc. Practised by lazy anglers who don't want to cast very far.
Other names: berley, ruddy dubby, groundbait
Also see "pollution".

- also a fishing companion (US, UK)