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Ocean life

New box jellyfish species found off Alicante

Researchers in Spain identify Copula lucentia, a tiny transparent jellyfish, as the Mediterranean’s second known box jellyfish.

Reported by Phys.org · · 1 min read

On the map: Spain

New box jellyfish species found off Alicante
Image: Phys.org

A new species of box jellyfish has been discovered in the waters off El Campello, Alicante, in Spain. Named Copula lucentia, the tiny jellyfish measures between 1 and 7 millimeters and was formally described in 2024 by a team at the University of Alicante’s Marine Laboratory.

The discovery marks only the second documented box jellyfish species in the Mediterranean, following one identified in 1758. Researchers say the find highlights the region’s ongoing biodiversity surprises, even in well-studied seas.

The species was identified through specimens collected between 2016 and 2018, with its description published in the journal Marine Biodiversity. Genetic and morphological analyses confirmed its distinct features, setting it apart from related species like Copula sivickisi.

Copula lucentia has a cube-shaped, nearly transparent bell and four tentacles. It was found at shallow depths in rocky, sandy, and seagrass habitats. The name references Lucentum, the ancient Latin name for Alicante.

Researchers emphasize the need for further study to understand its ecological role, distribution, and life cycle. The species is now on display at Valencia’s Oceanogràfic, where scientists are attempting to breed it in captivity for the first time.

The discovery is part of broader efforts, including the Sea4Future project, to study gelatinous organisms and their impact on marine ecosystems, particularly their interactions with fisheries and vulnerable species.