The alien lionfish, Pterois miles (Bennett, 1828), enters the Adriatic Sea, Central Mediterranean Sea

The lionfish Pterois miles (Bennett, 1828), is considered one of the most dangerous invasive species for the Mediterranean biome. Since its first sighting back in 1991, the species spread widely along the Levantine Basin, in the central Mediterranean, along the North African coasts (from Egypt to Tunisia) and in Sicily. This paper reports the first sightings of the lionfish from the Adriatic Sea, in the coasts of Puglia and Albania, observed during July 2019 and August 2020.