I don't even....
Every now and then some bullshit "study" like this one appears.
I think my subject is slightly misleading, the study is not actually knocking fish oil, it lists the benefits of fish oil in the study. What it is questioning is the effects of oxidized fish oil, ie fish oil that has gone rancid or has been damaged during manufacture.
As a side note the the bulk of positive studies that have shown the benefits of fish oil, were mainly where the subject was eating oily fish and not fish oil supplements/capsules. Most of the studies that have failed to show the benefits of fish oil have been the ones using fish oil supplements.