Geographic location
Arctic
12
Arctic Ocean
12
Barents Sea
Bering Sea
12
Bismarck
12
Chukchi Sea
Gulf of Alaska
12
Indian
12
Norwegian Sea
12
Pacific
Coastal Waters Of Southeast Alaska
8
Greenland
8
Hudson
8
Hudson Bay
8
Kattegat
8
Okhotsk
8
Baffin Bay
4
Bali
4
British Columbia
4
Canada
4
East Siberian Sea
4
Southern Ocean
4
Western Basin
4