Deep sea has an intense blue color. The light that penetrates the water changes its light intensity and its spectral composition by effect of  selective absorption by water of the different wavelengths that make up the visible spectrum. The ultraviolet and infrared stop the first few centimeters of depth, then extinguished the red, orange, yellow, green and purple and blue that reaches greater depths. ...

The Pompano, Trachinotus ovatus, is a bony sea fish belonging to the Carangidae family. In the video we see a specimen trying to capture anchovies, Engraulis encrasicolus, with rapid and lightning attacks. Distribution and habitat It is widespread throughout the Mediterranean Sea and in the eastern Atlantic Ocean between the English Channel and tropical Africa. It has very rarely been found as far north as Sweden and Norway. In Italian waters it is very common. It is pelagic but typically coastal, ...

Abalones or Haliotis are gastropod molluscs of the genus Haliotidae. In Italy the name that is used is Ear of Venus, a name that derives from the beauty of the pearlaceus side inside the shell. The external side as seen is completely different and looks like a concretion or a rock, and it is precisely for this reason that they are difficult to identify on the seabed or attached to rocks. Our Ear of Venus was in a hole a few meters deep and obviously we only found the shell, probably the residue of the usual octopus meal. ...

We are on some isolated rocks at a depth of 40/46 meters, where we have found two beautiful specimens of Charonia tritonis, Giant mediterranean triton.  This is the mollusk and consequently the largest shell in the Mediterranean Sea. In this dive we met two of them, we filmed the first one casually on the wall we were exploring, we realized watching the footage that we passed by without seeing it. The second was inside a hole from which we moved it to try to film it better. ...

We found these three specimens of Felimare tricolor on a rocky and coralligenous bottom at a depth ranging from 45 to 50 meters. These animals are quite common in the Mediterranean and are also difficult to photograph and film ...