Concentration of the four fatty acids groups (SFA, MUFA, PUFA, HUFA) present in the specimens of the species studied: SM—Sargassum muticum, UP—Undaria pinnatifida, GG—Gracilaria gracilis, CP—Colpomenia peregrina, CJ—Calliblepharis jubata, CT_MG—Chondracanthus teedei var. lusitanicus (male gametophyte), CT_GF—Chondracanthus teedei var. lusitanicus (female gametophyte), CT_T—Chondracanthus teedei var. lusitanicus (tetrasporophyte), GT_FG—Grateloupia turuturu (fructified gametophyte), GT_nFG—Grateloupia turuturu (non-fructified gametophyte), GT_T—Grateloupia turuturu (tetrasporophyte), AA—Asparagopsis armata. Statistically significant differences in the same fatty acid content among the species are expressed by letters above the bars.