Ethanol extracts of Spirulina platensis and Chlorella pyrenoidosa are thought to have potential as natural anticancer. This study aims to screen the potential for anticancer activity in vitro with the DPPH method and in vivo using the BSLT method. The test animals used were 48-hour-old Artemia Salina which were divided into 4 groups. The negative group was given 1% DMSO solvent, the positive gr…