Interesting species of bivalves coexist in the marine world , which are living beings located within the branch of molluscs that constitute some 13,000 species and that are called that because they have two shells, that is, two hard and outer pieces joined together to form the shell The vast majority of them feed through water filtration, since they trap food in the form of particles, taking phytoplankton as an example.
These types of molluscs have colonized almost all aquatic areas and the most common is that they live in sediments at the bottom of the sea or in freshwater areas, bearing in mind that they are considered sedentary because many of them do not move from the place from the juvenile stage.
The oyster comes from the Ostreoida family and is considered one of the most appreciated edible molluscs. It is found in rocky areas or buried in the sand , taking into account that it is capable of surviving at a depth of 80 meters. It feeds on microscopic algae that remain in the dewlap and then passes into the mouth, and is capable of filtering about 200 liters of water a day.
The clam is a bivalve mollusk that is found in the area of salt water buried in shores or seas. The most curious thing is that it has a feeding mechanism known as suspensivore , that is, it engulfs many food particles during each feeding action and it is not exclusive at all.
It should not be forgotten that an industry has been created around this type of mollusk due to comprehensive use. The reason for this is that its meat is highly valued gastronomically, in addition to being used as bait for fishermen.
The razor clam belongs to the Solenaceae family and the Ensis genus , and lives on the seabed buried in the sand as it is capable of digging vertically, which is why it is found on the beaches of the Mediterranean and the Atlantic Ocean. It is described as a kind of knife with a length between 7 and 15 cm , and with an elongated, rectangular, thin and almost straight shape.
The mussel is a marine lamellibranch that is made up of a shell and a visceral mass. It usually lives in intertidal zones and submerged areas of the coasts, in addition to feeding on algae and organic matter already prepared thanks to filtration through its gills.
The mussel has great nutritional value as it is a food rich in protein and contains a high level of good fats.
The scallop, also called Galician or European scallop, is a bivalve that lives in sand or gravel bottoms near the coast, digging up to 100 meters deep to find clean water. It is characterized by being hemaphrodite, so when it develops and matures it does so through the gonads, that is, the male reproductive organs.