Even we at intotheblue.it could not miss the infamous and by now famous this summer, Blue Crab - Callinectes sapidus - also known as Blue King Crab. We filmed it after several reports, on the stretch of coast between Vada and Rosignano Solvay, luring it with a bait to film it with the camera. This alien species has colonized the Mediterranean for at least fifty years but has spread by invading the coasts in recent years perhaps precisely because of the now inevitable warming of the waters of the Mediterranean Sea. ...

European barracuda, Sphyraena sphyraena (Linnaeus, 1758), also known as the European barracuda, is the endemic species of the Mediterranean Sea. Mediterranean barracuda, Sphyraena viridensis, commonly known as yellow-mouthed barracuda, is instead the alien species, that is, the one that was limited to a restricted basin of the eastern Atlantic (Cape Verde, the Canary Islands and the Azores) ...

Salpa maxima also arrived in the upper Tyrrhenian Sea or lower Ligurian Sea, that is, in the waters of Livorno and the province where we often dive. It is a Tunicate; at first sight it looks like a cross between a fish and a jellyfish but it is neither, it is actually a transparent invertebrate belonging to the order of the Salpidae subphylum Tunicata, coming from the deepest oceans and very rare in the Mediterranean....

While I was trying to film some sea anemones Anemonia sulcata and Actinia equina, I found a toxic alga: Ostreopsis ovata, and an alien alga: Caulerpa in clusters, Caulerpa racemosa. ...

Mediterranean Barracuda or Yellow-mouth Barracuda (Sphyraena viridensis) is an endemic species of Mediterranean Sea, although many consider it an alien species ...

This video made on August 20, 2019 documents the invasion of Mnemiopsis leidyi ...