Pollock or pollack (pronounced ) is the common name used for either of the two species of north atlantic marine fish in the genus pollachius. pollachius pollachius is referred to as pollock in north america, ireland and the united kingdom, while pollachius virens is usually known as coley in great britain and ireland (derived from the older name coalfish). other names for p. pollachius include the atlantic pollock, european pollock, lieu jaune, and lythe; while p. virens is also known as boston blue (distinct from bluefish), silver bill, or saithe.

Source: Wikipedia