The antibiofilm, antibacterial, antioxidant, and anticancer activities of the methanolic extract of L. were determined. Results deduced that the algal extract had a high biofilm formation inhibitory action done via crystal violet (CV) assay, to 88-99%. The results showed a strong antibacterial against the identified bacteria species. , , , , , and the extract had moderate antibacterial activity against , and . The algal extract has a concentration-dependent DPPH radical scavenging activity (84.59%, with IC = 170.31 µg/ml). The inhibitory percent of methanolic extract antiproliferative activity was 1.79-98.25% with IC = 15.14 µg/ml against lung carcinoma. Phenols, terpenes, amino acids, alkaloids, flavones, alcohols, and fatty acids were among the metabolites whose biological actions were evaluated. In conclusion, for the first time, methanolic extract exhibited effective antibiofilm, antibacterial, antioxidant, and anticancer activities. .
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