These scientists attempt to distinguish between plant-derived, marine-derived, and docosahexaenoic acid omega-3 fatty acids (beneficial fatty acids essential to good health in people). These scientists also relate the 2002 state of scientific knowledge with regard to both eating fish and taking omega-3 fatty acid supplements.
Omega-3 fatty acids are shown in certain scientific studies to reduce the incidence of certain heart disease in people (here, cardiovascular disease or CVD)
Follow this link http://circ.ahajournals.org/cgi/content/full/106/21/2747%20
AHA Scientific Statement: Fish Consumption, Fish Oil, Omega-3 Fatty Acids, and Cardiovascular Disease. Circulation. Vol. 106. pp 2747-2757. 2002.