cervonic acid , its systematic name is all-cis -docosa-4,7,10,13,16,19-hexa-enoic acid , and its shorthand name is 22:6(n-3) in the nomenclature of fatty acids . Cold-water oceanic fish oil s are rich in DHA. Most of the DHA in fish and multi-cellular organisms with access to cold-water oceanic foods originates from photosynthetic