It's better to get omega-3 fatty acids from fish than from fish oil supplements. ( from webmd )

It's better to get omega-3 fatty acids from fish than from fish oil supplements.

Stick with fish, not capsules. Most of the encouraging studies have looked at people eating fish, not taking a supplement. Extracted omega-3 fatty acids may not have the full benefits of what's naturally in fish.

Some recent studies of people at higher risk of heart disease did not find that omega-3 supplements helped. People with heart disease should talk to their doctor to see if omega-3 supplements might be a good idea.

Info source:
http://www.m.webmd.com/food-recipes/rm-quiz-fish-fact-fiction?ecd=wnl_hrt_100212&ctr=wnl-hrt-100212_ld-stry