The Agency advises caterers and consumers to:
put fish in the fridge or freezer (in covered containers) as soon as possible – ensure that fridges or chilled display equipment are set at a temperature of 5˚C or below, and freezers are set to a minimum of -18°C
thaw fish in the fridge overnight, or to thaw it more quickly, use a microwave. Use the ‘defrost’ setting and stop when the fish is icy but flexible
wash hands thoroughly before and after handling fish
buy fish from a reliable source
As well as following this advice for fresh fish, it also applies to fish products (e.g. canned tuna after it’s been opened).
cheers Penny