Fish oil: risks and benefits

A recent meta-analysis article in JAMA "Fish Intake, Contaminants, and Human Health Evaluating the Risks and the Benefits" concludes that:

"For major health outcomes among adults, based on both the strength of the evidence and the potential magnitudes of effect, the benefits of fish intake exceed the potential risks. For women of childbearing age, benefits of modest fish intake, excepting a few selected species, also outweigh risks."

Since the authors found that "modest consumption" of fish results in a 17% drop in total mortality, I'd say that's a rational conclusion.