I've just finished the challenge. I've uploaded a video on YouTube in case you want to see how to do it. I hope it can help

Stop searching and wasting your time, big mackerel and big flat fish simply are not in the game. Let's hope they will fix it in the next update (we're asking those fishes since December)

Sure. Devs have already released an hotfix for the free helix items from pink boxes in river raid but they can't release one for those fishes after three months that we're waiting.

@bielik01 same bro. playing on pc

I cannot complete the mission but I bought everything from Norvid

15 gb and still no big flat fish and big mackerel. Is this a joke??

@ubi-borealis after the patch 1.04 big mackerel, big flatfish and big eel are not available in the game bro

@imaginaryruins if the big eel isn't necessary to complete the challenge why do you want to complicate the life of the developers? They have barely fixed the flatfish and the mackerel thing

@auridulis I agree. I hate when things get unmarked

@thenorfolkian yes, I suggest you to not buy the same gear set. I did and I had to remove the duplicate items with a tool

@RCDeschene same, the quest is still there after finishing the saga

@TRITONK175 same. I had all the challenges completed except Ambianum that it is still bugged, but now I have them all marked as incomplete

@Metroid_Meister same. I had all the challenges completed except Ambianum that it is still bugged, but now I have them all marked as incomplete

@ubi-oxavo with the update 1.5.2 the jotun armor appeared in my inventory when I traveled to svartalfheim

@ubi-keo dude still not fixed and still not have the jotun armor

@ubi-nacho I have all parts of the jotun gear set except the armor and yes my save is accessible on the cloud

@bielik01 I know what he meant but I can't enter in the portal because it didn't gave me the jotun armor. Another bug that should be fixed

@ubi-gizmo any update?

@d4rkdrag0n same. Now I can't enter in the gate near Austri-Stivlar because the armor is missing in my inventory.

@ubi-gizmo I've defeated all the zealots and suttungr's outriders but I don't have the Jotun Armor in my inventory even if I have finished all the Dwarf in Distress missions and visited the specific point where the wolves are located (that I have already defeated). Now without the armor I can't enter in the gate near Austri-Stivlar.