For individuals and small groups (1-8)
Oslo fjord is a gorgeous fishing place. Fish population around the capital is stable and you have a chance to get practically any sort of local sea fish you ever heard of. Sea fishing is allowed and free, but you mast have own fishing equipment. You’ll see plenty of people fishing around the harbour area – talk to them about good spots.
Unlike sea fishing, fresh water fishing requires permit. You can read more about it here: Visit Norway