The Mediterranean Sea still holds species unknown to science. One of them is Copula lucentia, a tiny jellyfish measuring just a few millimeters. Discovered off El Campello, in Alicante, it was formally described in 2024 by a research team at the University of Alicante (UA) Marine Laboratory in Dénia, which forms part of the university's Ramón Margalef Multidisciplinary Institute for Environmental Research.