In recent years, cancer has been one of the main public health problems in the world. Breast, colon, lung, stomach and liver cancers are among the types with the highest incidence worldwide and among the types with the highest mortality rate. Treatment failure due to resistance to conventional therapies and drugs with severe adverse effects corroborate this clinical outcome. The marine environment has great biodiversity and consequently a great structural variety of secondary metabolites with the potential to become new treatments for various pathologies such as, for example, bacterial, fungal, viral, parasitic infections and cancer. Therefore, I am interested in obtaining compounds with antitumor potential from marine organisms for the development of new therapies for cancer.