We are thinking he is grey/harbor mix considering the other 4 are harp ( 20 years ago there were 2 more, harbor and grey ) We care for 5 seals total. All are on fresh sea water pumped directly from the ocean by the minuet, live mussels by the hour if they want because it comes in with the sea water, herring daily and a fish ball filled with frozen caplin they have to manipulate in order to feed. Theres, Jamie(male), Tyler (male), Babs (female), Deane (female) and Lenny (male )