Jellyfish in Ibiza are no longer an unusual sight. Over the last few years, these marine creatures have become increasingly common in the waters surrounding the island. Tourists and locals alike are often surprised to find them so close to the shore, but experts explain that their presence is the result of a mix of natural and human-driven factors. If you are planning a holiday in Ibiza, it is important to understand why jellyfish appear, which species you may encounter, and how to protect yourself while enjoying the Mediterranean.
Why jellyfish are appearing more frequently in Ibiza
The main reason jellyfish appear in Ibiza is the rise in sea temperature. Warmer waters are ideal for jellyfish reproduction, and as climate change brings longer summers and higher water temperatures, their life cycle accelerates. This means more sea jellies appear and remain in coastal areas for longer periods.
Ocean currents and winds also play a role. In particular, southern and eastern winds can push the specimens towards the coastline, concentrating them near beaches. Calm, hot days with little wave activity make the conditions even better for their arrival.
Another factor is the reduction of their natural predators. Turtles, tuna and sunfish are among the marine animals that feed on jellyfish. However, overfishing and pollution have reduced their numbers, leaving jellies populations without enough natural control. The result is a visible increase in jellyfish blooms along the Spanish coast, including Ibiza and Formentera.
The species found in Ibiza
Not all jellyfish in Ibiza are the same. Some are harmless, while others can cause painful stings. During the spring and summer of 2025, several species have been reported along the island’s beaches.
Velella Velella
This is one of the most striking species, often described as a floating carpet of small blue creatures. They usually arrive in spring, especially in March and April, and have been spotted on beaches such as Benirràs, Punta Galera, ses Salines and Sant Antoni. The good news is that they are not toxic. Contact may cause slight irritation or redness, but their presence is more spectacular than dangerous.
Pelagia Noctiluca
This is one of the most common specimen in the Balearics during summer. Unlike the Velella Velella, its sting can be more serious. It can cause intense irritation, allergic reactions or even vomiting, depending on a person’s sensitivity. Swimmers should be especially cautious if this species is present.
Portuguese Man o’ War
Despite being commonly referred to as a jellyfish, the Portuguese Man o’ War is actually a siphonophore. Its sting is extremely painful and can be dangerous. Authorities always advise avoiding swimming if one is sighted, as its long tentacles can extend far below the surface and catch swimmers unaware.
The Blue Dragon
Although not officially classified as a cnidarians, this small sea slug can also be found in Mediterranean waters. It is known for feeding on venomous jellyfish and storing their venom, making its sting toxic. Its small size can make it difficult to spot, but swimmers should still be aware of its potential danger.
How to prevent jellyfish stings
While it is impossible to completely eliminate the risk of encountering jellies, there are practical steps you can take to reduce the chances of being stung.
- Check alert apps: technology is on your side. Some applications allow you to check real-time jellyfish sightings across beaches in Ibiza. They also provide information about species identification, danger levels, and even first aid recommendations in case of a sting.
- Observe the beach before swimming: if you see jellyfish floating near the shore or in the water, it is best to stay out of the sea. Always alert lifeguards if you notice a group of them.
- Never touch them: even if they appear dead or washed up on the sand, jellyfish can still sting. Keep children away and avoid handling them at all times.
- Pay attention to lifeguards’ advice: many beaches in Ibiza have lifeguard services during the high season. Follow their instructions, as they often receive updated information about jellyfish presence.
What to do if you are stung by a jellyfish
In the unfortunate case that you are stung, knowing how to react is essential. While each case can vary depending on the species and the person’s sensitivity, basic first aid guidelines include:
- Get out of the water immediately to avoid further stings.
- Do not rub the area, as this can spread the venom.
- Rinse with seawater, not fresh water, as fresh water may worsen the reaction.
- Seek assistance from lifeguards, who usually have the right products and training to treat jellyfish stings.
- In severe cases, such as difficulty breathing, dizziness or intense pain, call emergency services immediately.
Enjoying the sea safely
Jellyfish in Ibiza should not stop you from enjoying the island’s stunning beaches and crystal-clear waters. With a little preparation and awareness, the risk can be minimised. The best approach is to stay informed, use available tools such as tracking apps, and respect the advice of local experts.
For most visitors, jellyfish are simply part of the natural environment of the Mediterranean. By taking precautions, you can ensure that your holiday in Ibiza remains safe, comfortable and unforgettable.
