One, what is the scallop
Scallop, also known as sea scallop clams, belonging to the mollusc family, scallop family, is one of our country's important shellfish species, its body is rich in protein, is a set of food, medicine, tonic for the integration of an important aquatic food, is widely distributed in the world's oceans, more than the low tide zone in the low tide zone to a few hundred meters or so of the shallow sea, mainly mayfly algae for food.
Two, scallop morphology
Scallop is generally disc-shaped or circular fan-shaped, two equal or unequal ears, most of the scallop right shell below the ear in front of the foot filament holes and pectineal teeth are obvious, the shell surface has a concentric piece of carvings, its closed-shell muscle marks obvious, the outer coat marks simple, no water pipe, the inner ligament is located in the shell top of the lower part of the ligament groove of the triangular.
Three, the main species
1, pecten scallop
(1) shell fan round, about 7-9 cm long, its shell height is slightly larger than the shell length, the two shells are generally the same size, but the left shell is more convex, the right shell is more flat, the front ear is larger than the back ear, the back ear is slightly right-angled isosceles triangular, the front ear is slightly rectangular, the left shell has radial ribs of 10 or so, the right shell has radial rib of about 20. The shell surface is generally purple-brown, light brown, yellow-brown, red-brown, apricot-yellow, grayish-white and so on.
(2) It mainly feeds on plankton, and uses its gills to filter and feed on plankton and organic debris in the water. It is distributed in the Yellow Sea, Bohai Sea, East China Sea, Korean Peninsula, Japan and other places.
(3) ctenophore scallop grows faster, the meat is delicious and nutritious, and its dried products are valuable sea treasures, and the shells are more beautiful, which can be used as the raw materials for shellfish carvings and other handicrafts.
2, bay scallop
(1) shell medium size and rounded, two shells of equal size, shell dorsal edge is straight, the ventral edge and the front and back edges are rounded, the shell surface is generally gray-brown or light yellowish-brown, and there are dark brown or purple-brown cloudy patches, generally lighter in color on the left shell and the right shell color is darker, the shells are full of radial ribs,*** there are about 18.
(2) bay scallop is a filter-feeding shellfish, filter-feeding microorganisms in the water, unicellular algae, organic debris and marine small organisms, native to the U.S. Atlantic coast, and now in our country's northern coasts have reproduction and growth.
(3) bay scallop meat more plump, flavorful, fast-growing, is a better object of culture, has been formed in the northern coast of China's large-scale mariculture business.
3, scallops
(1) for large shells, shell height of more than 20 centimeters, the right shell protuberance is yellowish-white, the left shell is flatter and slightly smaller than the right shell, was purple-brown, the shell is nearly round, the top of the shell before and after the two sides of the size of the auricular protuberance, the right shell of the front ear of the foot of the shallow silk holes, the surface of the shell has 15-20 radial ribs.
(2) Generally inhabits in the littoral zone where the bottom is relatively hard, the silt is less, and the water depth of the sea area is not more than 40 meters, and it is a filter-feeding shellfish, which eats fine phytoplankton and zooplankton, bacteria, and organic debris, and so on.
(3) Native to Russia and Japan, it is a kind of large economic shellfish with the advantages of large size, fast growth and high economic value, which is favored by domestic and foreign markets.