Solen grandis Dunker shells are elongated, with two shells hugged together to form a bamboo tube, with open front and back ends. The general shell length is 4-5 times the height www.biquge.info of the shell, the top of the shell is located at the very front, the dorsal edge of the shell is parallel to the ventral margin, but the middle of the ventral margin is slightly concave, this situation is more obvious in the growing individual, the anterior edge is inclined forward from the back to the abdomen, and the posterior end is rounded. The external ligament is black, triangular in shape, small at the anterior end and large at the posterior end, and its length is about 1/5 of the full length of the shell. The surface of the shell is protruding, and it is covered with a shiny yellow-brown skin, and the ventral margin and the back end of the shell are rolled up to the inner surface of the shell. The shell surface is smooth and free of radial ribs, and the growth line is distinct, sometimes with reddish colored bands. The inside of the shell is white or reddish ribbons can be seen. The hinge is small, and the left and right shells each have one main tooth. The anterior obturator muscle scar is long, slightly equal in length to the ligament, and is located anterior to the shell. The posterior obturator muscle scar is triangular, located at a quarter of the way to the posterior margin. The mantle marks are distinct, and the mantle sinuses are slightly triangular. The foot muscles of the animal body are extremely developed, the front end is pointed, the left and right sides are flat, and the water pipe is short and thick. The two pipes are healed, consisting of several links, with tentacles at the ends, and alternating gray-black and white stripes on the surface.

……

The long bamboo clam (Solen strictus Could) is also known as the straight bamboo clam. The shell is extremely elongated, the chitin is thin, the two shells are equal, and the shell length is about 6-7 times the height of the shell. The dorsal ventral margin is nearly parallel, the middle of the ventral margin is slightly concave, the anterior end of the shell is truncated, the posterior end is rounded, and the anterior end is slightly thicker than the posterior end. The external ligament is yellowish-brown. The surface of the shell is smooth and has a yellowish-brown skin, and the outer skin on the top of the shell of the growing old individual often falls off and becomes white. The growth line is distinct, curved, and sometimes folded at the posterior end. The inner surface of the shell is white or yellowish. The hinges are small, and each shell has a main tooth. The anterior obturator scar is extremely elongated and exceeds or equal to the length of the ligament. The posterior obturator muscle scar is slightly semicircular in length anteriorly and posteriorly. The coat marks are distinct, the anterior end is concave towards the dorsal margin, and the mantle sinus is semicircular. The animal body has short water tubes, two water pipes are healed, tentacles are at the ends, and there are black and white patterns on the surface, but they are not as obvious as large razor clams. There is a black band of pigment on the mantle muscle and the base of the water pipe. The feet are slender and columnar.

Cultellus scalpellum Sowerby shells elongated, with a straight dorsal margin, rounded anteriorly, and a terminal ventral margin that rises obliquely dorsal and sharper than the anterior end. The height is about one-third of the length. The top of the shell is located on the dorsal margin slightly anterior, and the length from the tip to the top of the shell is about a quarter of the length of the whole shell. The outer ligament is black and prominent. The surface of the shell is smooth and bright, and the growth line is not obvious at the lower top, and the more it reaches the ventral margin, the clearer it is. Sometimes folds are formed. The shell surface is covered with a pale yellowish-green skin. This kind of skin rarely falls off. From the top of the shell to the terminal ventral margin, there is a slight oblique line, the upper part of the line is lighter, and the lower part of the line is darker. The shell is floured white inside. The left shell of the hinge has three main teeth, the central one ends are bifurcated, and the right shell has only two main teeth. The anterior obturator muscle scar is small and oval, and the posterior obturator muscle scar is roughly triangular. The mantle line is extremely pronounced, and the mantle sinus is slightly square.

……

The slender razor clams (Solen gracilis Philippi) are also known as black-skinned razor clams. The body shape of this species is very similar to that of the long razor, the shell is extremely elongated, the shell length is about 6-7 times the height of the shell, and the dorsal and ventral margins are parallel and straight. The front and back ends are almost equal in size. The case has a bamboo-colored outer skin with a round front end and a square back end. The growth line is distinct, perpendicular to the dorsal and ventral margin. The diagonal of the shell table does not reach the very terminal edge of the shell. The inside of the shell is white. The hinge is located at the very front of the shell, and the left and right shells have a main tooth each. The anterior obturator muscle scar is narrow and long, more than half the length of the ligament. The posterior obturator muscle scar is nearly triangular, and the mantle line and mantle sinus are clear. The animal body has short, healing tubes, with distinct black and white stripes on the surface, and there are no black pigment bands on the ventral margin of the mantle. Only the base of the water pipe is slightly visible.

……

These are the types of razor clams, and in addition, razor clams can be processed simply.

There are two kinds of dried razor clams: cooked and raw. The processing method of dried cooked clams is to wash the fresh clams with fresh water to remove sediment impurities, put them in a pot of boiling water, cover them, stir them once after boiling, then cover them and boil them out of the pot, peel the shell and take the meat, wash them in water again, and spread them evenly to dry after filtering out the water. Generally, after three days of exposure, the clam meat becomes light yellow, the water pipe is hard, and it can be dry. On rainy days, you can dry it in a drying room, or add salt to marinate it (salt dosage: 5-7 kg / 100 kg), and then wash off the salt and dry it when the weather is fine. The processing method of dried razor clams is to peel the fresh razor clams directly and dry them into a dried product without cooking. Dried raw clams are more delicious, nutritious, valuable and less labor-intensive than cooked clams. The finished dried razor clams are yellow in color, dry, unbroken, and fragrant in smell. Dried razor clams have a hard texture and need to be steamed and boiled before cooking. The dried razor clams are yellowish in white color, silky, soft and tough, and are mostly used as ingredients for dishes, soups and porridges, which play a role in enhancing flavor and freshness; It can also be used as a main ingredient, but it is slightly inferior to fresh products in color, taste and tenderness.

The soup after boiling the clams is precipitated and filtered, impurities are removed, boiled over high heat first, and then slowly boiled over low heat until the water is concentrated to 7 percent, and the soup is yellow and viscous. Clam oil is delicious and delicious, and it is a very good umami condiment. Every 100 catties of fresh clams can be processed 3-4 catties of clam oil, and 2-3 catties of two-year clams.

……

The simplest is razor clams. Wash the freshly caught razor clams,

Stocked in clear water containing a small amount of salt, after the razor clams spit out the sediment in the abdomen, gently cut the back connection of the clams with a thin blade, pour it into boiling water, and cook it. Its meat is tender and has a unique flavor, making it a delicacy that goes well with sake. The ancients once praised a poem: "The four-inch tail of the sand dragon is yellow, and the flavor comes from Shao Yang; Wheat flowers bloom in three and a half months, and the beauty seed market clams and seedlings. "It is also often cooked into dishes with strong fire, hot oil, and quickly, which can better reflect the color, shape, taste, and taste of razor clams.

……

Cultivating razor clams is also not a simple thing, and there are many sayings.

In the selection of breeding sites, the mid-tidal sea area with small wind and waves, smooth tidal currents and a little fresh water injection was selected as the clam breeding field.

The tidal flat is flat, the slope is small, the coating surface is stable in the windy season, and it is generally not covered by sediment. The coating quality is better to be muddy (or slightly sandy), the mud is moderately soft and hard, the coating structure is tight, there are no holes and thin mud layers in the middle, and the water retention performance is good.

In spring and autumn every year, diatoms (commonly known as "oil sludge", a yellow-brown plankton, which is the main food of razor clams) are epiphytic and reproduced, which occurs in a large area and stays for a long time, providing rich food for razor clams.