Tridacna maxima is a giant bivalve species of the Tridacnidae family. Popular among the aquarists, it is often found in a marine aquarium. In Polynesia This species is called “Pahua ” and enters the local cuisine. It is a sessile bivalve that can reach an impressive size from 40-60 cm to 1,6 metres.

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.

The Oysters, “they are wonderful”  (Ostrea), Ostreidae family, is a genus of bivalve molluscs from the rounded shell with scaly wavblades. ...