acids of C. humilis from Gran Canada were studied. A high content of polyunsaturated fatty
acids 16: 3 and 16: 4 was found. Their content in monogalactosyldiacylglycerols is over
90%. Triacylglycerols and phospholipids contain mainly arachidonic and eicosapentaenoic
acids. Reasons for the differences in the composition of fatty acids and sterols of various
species of Cystoseira are discussed. Some technological approaches are recommended.