Scribbled Filefish, Aluterus scriptus, commonly known as Scrawled filefish, Broomtail filefish or Scribbled leatherjacket, is a marine fish belonging to the family Monacanthidae. This species has a circumtropical repartition, it can be found in the tropical waters from the Atlantic Ocean, the Indian Ocean and the Pacific Ocean.

The Indian Damsel fish lives in the coral reefs of the Indo-Pacific from the surface to a depth of 15 meters. These fish live in groups that can even be numerous; they lead a mainly diurnal life and are quite easy to approach by snorkeling (as you can see from the video).

The Live Sharksucker or Slender Sharksucker, Echeneis naucrates, is a species of marine fish in the family Echeneidae Echeneidae. A live sharksucker is known to attach itself temporarily by its modified dorsal fin used as a sucking disc to various hosts, such as shark, rays, large bony fishes, sea turtles, whales, dolphins, ships, and even sometimes scubadivers.

Also in this year we are witnessing the now common and usual phenomenon of the inflorescence of marine mucilage along the coasts of our sea. At the same time as the mucilage, however, an excessive proliferation of the microalgae Ostreopsis cf. Ovata. Qhese two phenomena should not be connected or at least should not occur at the same time so frequently...

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 Blacktip reef Shark (Carcharhinus melanopterus) is a species of requiem shark, in the family Carcharhinidae, which can be easily identified by the prominent black tips on its fins (especially on the first dorsal fin and its caudal fin). Among the most abundant sharks inhabiting the tropical coral reefs of the Indian and Pacific Oceans, this species prefers shallow, inshore waters. Its exposed first dorsal fin is a common sight in the region. The blacktip reef shark is usually found over reef ledges and sandy flats, though it has also been known to enter brakish and freshwater environments.

We are in Sardinia, Capu Mannu, at the beginning of the Sinis peninsula Oristano province ...