This is absolutely true:
I was in a supermarket, with a friend, who was buying food for her family.
She picked up a packet, and this is what it said:
Succulent bite-sized morsels of fish for dishes such as fish pie, or mixed seafood platter. Filetted, skinned and boned.
Fish contents: Cod, Smoked Haddock, Mackerel, Nile Perch, Monkfish.
Allergy warning: Contains fish.