Warning Issued for Brits Visiting Costa del Sol After Sightings of Giant Jellyfish

Tourists visiting the Costa del Sol have been urged to stay alert following the appearance of massive jellyfish, some measuring up to 10 feet in length. The recent discovery of a Rhizostoma luteum jellyfish, commonly known as the "barrel jellyfish," weighing up to six stone (38kg), has led to warnings for beachgoers in the popular holiday region.

These jellyfish, spotted around Marbella's Cabopino beach, are known for their size and ability to release stinging cells into the water, which can cause severe itching and rashes when in contact with skin. The sting is described as mild, but the "stinging water" they produce can be irritating, especially on sensitive areas like the inner thighs.

The Rhizostoma luteum species has been increasingly observed along the Málaga coastline in recent years. Marine biologist Jesús Bellido, coordinator for the International Union for Conservation of Nature's Spanish Committee, noted that the species has become more common along the coasts of Málaga since the early 2000s. "We have noticed a higher frequency of sightings in the late summer months, particularly from mid-August through September," Bellido explained.

Beachgoers have shared photos and videos of the giant jellyfish on social media, showing the striking creatures, which can grow up to 10 feet in length and have arm-like appendages. Despite their intimidating appearance, their sting is relatively mild, though they can release a mucus-like substance containing stinging cells that mixes with seawater, causing itching even without direct contact.

The Rhizostoma luteum jellyfish has a history of rare sightings, leading to uncertainty about its classification as a species until more frequent reports emerged in the 21st century. In 2012, around 50 specimens were recorded along the Spanish Mediterranean coast, particularly on the beaches of Murcia, Almería, Granada, and Málaga.

Though they primarily inhabit open waters, these jellyfish are increasingly seen along the eastern Atlantic coast, from the Cantabrian Sea down to Senegal. Currents and storms often carry them closer to shore, where they are now more frequently spotted in regions like the Strait of Gibraltar and the Alboran Sea.

Local authorities, alongside Spain's Aula del Mar Foundation and the Infomedusa project, are continuing to monitor the situation and have urged tourists to be cautious when swimming in the affected areas.