Invasive Warty Comb Jelly Threatens Venice Lagoon Ecosystem

The warty comb jelly, Mnemiopsis leidyi, native to the western Atlantic, has established a significant presence in Venice's lagoon system. Likely introduced via ballast water from ships, this invasive species has been observed in the Adriatic Sea since 2016.

A recent two-year study by the University of Padua and the National Institute of Oceanography and Applied Geophysics highlights the jelly's adaptability and the favorable conditions for its proliferation, attributed to ongoing climate change. The researchers warn that this could negatively impact other species within the ecosystem.

Mnemiopsis leidyi is known for its voracious appetite, consuming zooplankton, fish eggs, and larvae, which disrupts the local food web and poses challenges for Venetian fishermen. The gelatinous nature of the jellyfish also clogs fishing nets, further hindering fishing operations.

The species is listed among the world's 100 most harmful invasive species. Its presence in the Adriatic Sea has been linked to declines in anchovy populations due to competition for food resources.

The study underscores the need for ongoing monitoring and management strategies to mitigate the impact of Mnemiopsis leidyi on the Venice Lagoon's ecosystem and local fisheries.