The Mediterranean mussel (Mytilus galloprovincialis) is a species of bivalve, a marine mollusc in the family Mytilidae. It is an invasive species in many parts of the world, and also an object of aquaculture. Mytilus galloprovincialis is one of the three principal, closely related species in the Mytilus edulis complex.

Neopycnodonte cochlear is a species of marine bivalve molluscs belonging to the family Gryphaeidae.This species can be found in the North Atlantic Ocean (Azores) and in the Mediterranean Sea. The peculiarity we want to point out is that it is a small oyster that plays the same role as corals. That is, it forms aggregations as they grow and multiply, create agglomerations of more or less large dimensions comparable to corals.

Noah's Ark seashell, Arca noae, is a species of bivalve mollusc in the family Arcidae. It is found in the Mediterranean Sea from low tide mark to a depth of 100 metres. The seashell of Arca noae grows to about 10 cm in length. but the ones we found did not exceed 3, 4 centimeters. Quite difficult to identify on the seabed because the shells are always covered not only by sponges but also by algae or other encrusting organisms. We noticed their presence because they were found open without the presence of the mollusc which was certainly prey to either an Octopus or fish such as Sea bream and Bream.

Sea Date, Lithophaga lithophaga, grows and lives inside the rocks, so it is practically impossible to see and film it unless the rock where it is found is shattered, an obviously illegal practice, prohibited by the regulations of all Mediterranean countries. Consequently, fishing is also prohibited and those who practice it are finally punished with severe and heavy sanctions, unless it is our usual friend the common octopus, Octopus vulgaris, who does it.

Spondylus gaederopus is a species of marine bivalve mollusc, a thorny oyster in the family Spondylidae. This species is endemic to the Mediterranean Sea. Spondylus gaederopus attaches itself to the substrate with its lower valve, which is usually white, while the upper valve is usually purple. Specimens that are all white, or all purple do, however, exist.

We all know or have seen at least once the scallop (Mediterranean scallop) Pecten jacobaeus shell, since it is often collected for its beauty or used as a vessel or container. This bivalve mollusc is rather sought after for the goodness of its meat and, as can be seen from the film, not only by man but above all by the Octopus (Octopus vulgaris) of which it is greedy like almost all molluscs. ...

During a scuba diving in a seabed of about twenty meters of sand and rock, I found a specimen of Noble Pen Shell, Pinna Nobilis, probably affected by the parasite Haplosporidium Pinnae. ...

Pinna nobilis (Linnaeus 1758), commonly known as mussel pen, Noble pen shell or fan mussel, is the largest bivalve in the Mediterranean Sea ...