Biodiversity and frequency of occurrence of jellyfish (cnidaria) in Al Hoceima Bay (North coast of Morocco, Alboran Sea)B. Benyoub, O. Kada, H. El Ouarghi, B. Mghili and A. AknafE3S Web Conf., 364 (2023) 01003DOI: https://doi.org/10.1051/e3sconf/202336401003