On the Fjordur map of Ark Survival Evolved, you can find the Aberration mushrooms ( Aggeravic, Ascerbic, Aquatic, and Auric) in caves and in the Asgard realm Aberration biome. However, the best place to get these mushrooms in on the main Fjordur map. The swamp island biome on the far western portion of the map (Lat 42.6 Lon 13.0) has many mushrooms you can just pick up with your hands. They look just like mushrooms, not some weird plants, like they are in the caves. When you pick up the red mushrooms with the white spots you will randomly get Aggeravic, Ascerbic, Aquatic, Auric and rare mushrooms too. With so many mushrooms here, I don't know why you would need to go anywhere else!
|Harvest these mushrooms, by hand or with a tame on Fjordur and you will get the Aggeravic, Ascerbic, Aquatic, and Auric mushrooms.|