Melanoma is one of the most aggressive malignancies. It is not uncommon for this lesion to develop unnoticed for a long time, so that by the time the cancer is diagnosed, numerous metastases may even be present. It is precisely because of the risks associated with melanoma that more and more treatment options are being sought for this cancer. A potential new therapeutic method has been reported by scientists in the United States and Brazil, who claim that melanoma can be treated with ... substances derived from bacteria living in sea water.