Pollack and Pollock are white, round fish. The difference between Pollack and Pollock is the area in which the fish is caught. Pollock is also known as Alaska or Walleye Pollock. Pollock comes from the North East Pacific Ocean – one of the most important commercial fisheries. Pollock is mainly caught by the trawl fishing method. The Latin name for Pollock is Theragra Chalcogramma. Pollack is from the North East Atlantic. The Latin name for Pollack is Pollachius Pollachius. Pollack are caught by method of hook and line, or trawled.