From one of the comments below about canned sardines.
My uncle works for the FDA, he said several Sardines in Olive Oil brands are actually not pure Olive Oil but mixed with Canola Oil and low grade grade veg oil, so I'd suggest get the ones Sardines in Water and use your own Olive Oil at home. Why take the risk. You don't want Veg oil as its full of the bad Omega 6s and overall poor oil to put in your body.