Having eaten both reasonable sized pollack and coalfish, I can remember that the flavour of coalfish was rather insipid compared to that of pollack, despite the flesh being tantalizingly white and flakey. Perhaps this is why I often see pollack as an ingredient in supermarket items such as fish fingers and fish pies, but so far no mention of coalfish.Show it to a starving rabid dog. If it eats it then it is a pollack, if it rejects it then it is a coalie.
Always a bit more colour in a pollack. As the name implies coal fish are quite dark.
No doubt you are correct. But when it is in the packet at Lidl I think it is coalie.Alaska Pollock is actually closely related to cod in the genus Gadus; and Pollack and Coalfish are in the genus Pollachius.
Strangely, they call Coalfish 'Pollock' in the States......