Centra and Supervalu have begun recalling batches of several fish products after the presence of listeria was confirmed. Smoked salmon, mackerel and prawn cocktail products are among the items covered. The recall applies to all use-by dates for the listed products, rather than targeting only one batch or expiration period. Listeria is a bacterium associated with foodborne illness, and its presence prompted the withdrawal across the range. Shoppers who bought any of the affected products should check the packaging and store notices for the full details of the recall. The action covers a broad selection of Centra and Supervalu fish products, so the date printed on the packet alone would not establish whether an item is affected.