Giant shark encounter in Iceland

This was filmed in August 2022. We had seen lots of whales and dolphins during the day. Late in the evening we decided to go out on the boat. We skipped life-vests this time because we wouldn’t go too far from the coast and the only life-vests available were large and bulky. But after rowing a little bit further into the fjord we noticed something floating not too far from us. We decided to go and investigate but suddenly we were further out from the coast than we had decided, and that’s when this huge beast appeared. I just heard some additional sound of water moving and looked over my sister´s shoulder when I noticed this fin coming straight at us. At first I thought it might be an orca swimming sideways, but it never went up for air. I rowed to the left and the shark followed, I rowed to the right and the shark turned as well to the right. Then I took a U-turn back to the coast and the shark continued to follow. Then I decided to stop rowing and see if it would loose interest. At that point I