Harp Seals were collected from four breeding grounds, the southern Gulf of St Lawrence (GS), the Newfoundland and Labrador Ice Front (NL and NL'), Jan Mayen Island in the Greenland Sea (GS), and the White Sea (WS). Maximum Likelihood analysis Identifies six major lineages (clades) (A - F) and within these up to five sub-lineages (A1 - A5). Groups are identified by posterior probabilities.