Dangerous devil firefish rapidly spreads along Croatian coast
- by croatiaweek
- in News
Devil firefish (Pterois miles) (Photo credit: Alexander Vasenin/CC BY-SA 3.0)
The invasive devil firefish (Pterois miles), after only sporadic appearances in previous years, has now firmly established itself in the Adriatic Sea as of 2024, according to marine experts from the Institute of Oceanography and Fisheries in Split.
As daily Jutarnji list writes, the Institute has confirmed that the devil firefish, also known as the common lionfish, is no longer a rare visitor but a permanent resident of the Adriatic.
This conclusion is based on data collected in collaboration with citizens and fellow researchers, and published in the scientific journal Acta Adriatica, issued by the Institute.
Between June 2024 and January 2025, 122 devil firefish sightings were recorded along the eastern Adriatic coast, pointing to the species’ rapid spread.
The greatest number of observations was noted near the islands of Lastovo and Vis, whereas the region around Dubrovnik recorded the most observations along the mainland shoreline.
A detailed map showing the locations with the highest frequency of sightings was also released.
“It is particularly interesting that the devil firefish was spotted even during the winter months, including in shallow bays and at relatively low temperatures,” researchers noted. “Environmental conditions in the Adriatic, especially in the central and southern parts, clearly pose no obstacle to this species.”
Sightings (Image: Institute of Oceanography and Fisheries in Split)
The devil firefish is known for its striking appearance but also poses significant ecological risks. It is a venomous predator with no natural enemies in the Adriatic, allowing its population to grow unchecked.
Experts warn it could threaten native fish species and disrupt the balance of marine ecosystems.
In response to the threat, scientists have included mitigation strategies in their study. These include potential removal of the species, especially from protected marine areas.
They also emphasised the risks to human health, as the devil firefish’s sting can be dangerous if not treated promptly.
(Photo: Jens Petersen/CC BY 2.5)
“Public involvement, alongside expert monitoring, is crucial in tracking and managing invasive species like the devil firefish,” the Institute highlighted.
As the situation develops, continued cooperation between citizens and marine biologists will be essential to protecting the Adriatic’s delicate marine biodiversity.
