Oceanologia Editorial Office uses CrossCheck's iThenticate software to detect instances of similarity in submitted manuscripts with already pub­li­shed materials, whether in print or on-line. All submitted manuscripts are checked for similarity to the publi­shed materials. In publishing only original reports from research, Oceanologia is committed to deterring plagiarism, including self-plagiarism. Manuscripts are rejected promptly on the grounds of proven pla­giarism.