Here is the full list of all 30 Fishing: Barents Sea achievements.
Catch 100 tons Mackerel
Catch 1,000 tons Mackerel
Found Trawling Area
Catch 100 tons Haddock
Catch 100 tons Red Fish
Unlocked Hermes
Catch 100 tons Pollack
Unlocked Lunar Bow
Catch 100 tons Cod
Catch 10,000 kg Red Fish
Catch 10,000 kg Haddock
Found port of Akkarfjord
Found port of Tufjord
Found port of Snefjord
Unlocked Vibeke Cathrin
Found port of Forsøl
Catch 10,000 kg Cod
Catch 1,000 kg Cod
Catch 10,000 kg Pollack
Catch 1,000 kg Red Fish
Unlocked Sjarken
Catch 1,000 kg Haddock
Catch 1,000 kg Pollack
Catch 100 kg Redfish
Catch 100 kg Haddock
Found port of Rypefjord
Catch 100 kg Cod
Found port of Hammefest Centrum
Catch 100 kg Pollack
Have a fish on your boat.