Mediterranean Sea faces ecological crisis from rapid warming

The Mediterranean Sea is experiencing a severe ecological crisis as it warms significantly faster than the global ocean average. This phenomenon, referred to as ‘tropicalization’, is transforming the region's underwater ecosystems and climate.

Due to its geographic position as a semi-enclosed basin with limited water exchange through the Strait of Gibraltar, the Mediterranean acts as a sensitive indicator for global climate change. Surface temperatures in certain areas, including the shallow waters of the Adriatic islands, are reaching 28 to 30 degrees Celsius—levels previously seen only in tropical seas like the Caribbean or the Red Sea.

These extreme marine heatwaves have catastrophic consequences for marine life. Sessile organisms, such as red corals and sponges, are suffering mass die-offs due to bacterial blooms triggered by high temperatures. Additionally, the warming waters are facilitating the invasion of ‘Lessepsian migrants’—invasive fish and algae entering through the Suez Canal from the Red Sea.