Invasive Species in Mediterranean Sea Reach Highest Level in History, Threatening Regional Ecosystem
(GENEVA) — A new report released today by the United Nations Environment Programme has confirmed that the population of invasive species in the Mediterranean Sea has reached its highest recorded level in history. According to the comprehensive 2024 survey, more than 1,000 non-native species have been identified throughout the basin, with the rate of new introductions accelerating over the past five years due to warming waters and expanding shipping channels.
The assessment, conducted over a two-year period, analyzed data from 23 nations bordering the Mediterranean. Researchers identified a significant increase in aggressive predator fish, algae, and jellyfish that are disrupting local food webs and outcompeting native species. The report specifically highlights the rapid expansion of the lionfish and the rabbitfish, both of which are voracious herbivores and predators that have decimated local fisheries, leading to economic losses exceeding 100 million euros annually across southern Europe and North Africa.
Experts attribute the surge primarily to the widening and deepening of the Suez Canal, which has created a warmer, more navigable corridor for species to migrate from the Red Sea. Combined with rising sea surface temperatures, these conditions have allowed tropical organisms to survive and reproduce in areas previously too cold for them. The report warns that without immediate international intervention, the ecological and economic stability of the entire region is at risk.
The findings were presented to the Mediterranean Action Plan committee earlier this week, where delegates from member states discussed potential countermeasures. Proposed strategies include stricter ballast water management protocols, enhanced port inspections, and the development of a rapid-response network for emerging outbreaks. No binding agreement has been reached to date.