Adriatic Sea Under Siege by Invasive Warty Comb Jelly Threat

The Adriatic Sea is facing a growing crisis as invasive species wreak havoc on its delicate ecosystem. Among the worst offenders is the warty comb jelly, a bizarre creature with a temporary anus and cannibalistic habits. This surge in invaders is now threatening the region's billion-euro fishing industry and forcing authorities to take drastic action.

The warty comb jelly, also known as the sea walnut, has rapidly spread through the Venetian lagoon. Believed to have arrived in ballast water from cargo ships, it now clogs fishing nets and devours fish eggs, larvae, and plankton. Its explosive population growth has disrupted local fisheries, leaving fishermen struggling to cope.

Climate change has made the Adriatic even more hospitable to these invaders. Warmer waters and shifting currents provide ideal conditions for the jelly to thrive. The species is ranked among the world's 100 most harmful invasive organisms, and its impact is being felt across the region.

The warty comb jelly isn't the only problem. Blue crabs, another aggressive invader, are also damaging fish stocks and nets. In response, Italy has launched campaigns to encourage their consumption, with supermarkets and restaurants now promoting them as a culinary option.

Authorities, including the Italian Coast Guard, the Ministry of Environment, and UNESCO, are fighting back. Measures range from mechanical removal by divers and specialised ships to biological controls using natural predators. Pilot chemical treatments, drone monitoring, and EU-backed international cooperation are also part of the strategy. Local NGOs like WWF Italy and Legambiente are assisting in tracking and managing the spread of these species.

The invasion of warty comb jellies and blue crabs is causing real economic and ecological damage. Fishermen face disrupted catches, while ecosystems suffer from the loss of native species. With ongoing efforts to control the spread, the coming years will show whether these measures can restore balance to the Adriatic.