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.

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

I have the ultimate edition and I have already played the mission "the way of the berserker", so why should I use 60 units to unlock it on ubisoft connect?

@tchester1980 same issue bro

@stickcollector same issues bro, plus the oxenefordscire map is still in my inventory

@jcar4327 I don't want to spend units for a thing I already have, but at the same time it bother me to see I have just a reward locked

@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

Finally I have the swordfish and completed the challenge. I hope ubi bring back the challenge they've removed in the next update

@elmac69 same. I had 5 crashes already

@ubi-borealis 100% confirmed for me after this patch

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

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.

@ubi-borealis tell developers to bring back the in-game progress tracker

@neovoltron "some" could be anything. Let's hope devs know about the big mackerel and big flat fish

@jcar4327 you need 3 regular eel for the last delivery

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)