Omega-6 is an essential fatty acid that we do need to obtain from our diets, but you are right, there may be a health concern if too much omega-6 is consumed. American diets consume more than 10 times omega-6 than omega-3 http://ods.od.nih.gov/FactSheets/Omega3FattyAcidsandHealth.asp, creating an imbalance between the fatty acids.
In the study I cited in the article, the majority of the fatty acids the scientists found were from oleic acid (56.2%). Oleic acid is a monounsaturated, omega-9 fatty acid http://en.wikipedia.org/wiki/Oleic_acid. Hope this helps
A friend was just telling my husband and me about her sons new baby girl; her name is Asahi (朝日(戦艦). Asahi means 'morning sun' in Japanese. Every time she said the name it sounded very similar, if not exact, to the pronunciation of Acai.