Jellyfish are always fascinating! whether they are dangerous or completely harmless like the Barrel jellyfish (Rhizostoma pulmo). Every time we find this jellyfish and publish the film on intotheblue.it (and on the YouTube channel) we register a lot of visits and receive many emails from curious people, simple enthusiasts, divers and marine biologists. So we are happy to publish this video even if it is not exactly recent, in fact made in 2022. ...

Beadlet anemone - Actinia equina - is one of the most common species of anemone or actinia in the Mediterranean Sea. It lives in the intertidal zone. The intertidal zone, also known as the shoreline, is the area above the water level at low tide and underwater at high tide. Simply put it is the area within the tidal range. ...

The Emperor Angelfish (Pomacanthus imperator) is a species of marine angelfish. It is a reef-associated fish, native to the Indian and Pacific Oceans, from Red Sea to Hawai and the Austral Islands. This species is generally associated with stable populations and faces no major threats of extinction. It is a favorite of photographers, artists, and aquarists because of its unique, brilliant pattern of coloration.

I met this Calyx nicaeensis, Goblet Sponge, during a dive in the reefs of the Secche di Vada near Livorno. The name owes it to its characteristic goblet shape. According to some experts, this sponge has become extremely rare in the Mediterranean because it requires very stable water temperature and biological conditions: small variations are enough to decree its disappearance. We all know by now that climate change has a heavy impact on biological life, but few seem to realize that it also affects the deep sea.

We met the Red Squirrelfish (Sargocentron rubrum) in the sea of ​​Cyprus while snorkelling among the rocks of the island. We did not expect to have this meeting in the Mediterranean because it is a tropical fish present in all tropical seas and in particular in the Indian Ocean and the Pacific Ocean. The reason for this sighting, as indeed for other tropical species now present in the Mediterranean, we owe it to the climatic warming of the sea, which creates favorable conditions, and to the Lessepsian migration: that is, to the entry and stabilization of animal and tropical species from the Channel of Suez.

And also this summer we found ourselves faced with the now regular invasion of the Sea walnut, Mnemiopsis leidyi (warty comb jelly or sea walnut). This phenomenon is becoming more and more frequent throughout the summers, and it is now clear that the main cause of these invasions is the increase in sea temperature. ...

Common conger is a bony sea fish belonging to the Congridae family. Here we see it in its lair at a depth of about 52 metres, on a muddy seabed at the base of a beautiful vertical wall, even a few meters high, of rock and coral. As we see, the wall is colonized by many Mediterranean organisms such as sponges, corals and gorgonians, full of caves and ravines where these fish seek shelter during the day and food during the night. ...