Sea cucumber without thorns is because it belongs to the light cucumber, sea cucumber is generally divided into the prickly cucumber and light cucumber, usually seen for the prickly cucumber, the surface of the surface without thorns is generally for the light cucumber, there are many imported sea cucumbers are light cucumbers without thorns, light cucumber, also known as the sea eggplants, from the South China Sea, Kansai, Japan, etc., and the meat is relatively rough, the taste is not as good as the prickly cucumber, and the nutritional value of the extremely low. Common edible sea cucumbers include imitation ginseng, plum ginseng and green ginseng.

The family of light ginsengs includes nine species of sea cucumbers, which is the family with the largest number of species:

The white ginseng with pattern is also known as white gourd ginseng, white milk ginseng, and two-spotted ginseng, etc. It has a fat body with two sides in front and two sides in back. It is fat, almost as wide as the front and back ends, resembling a melon, and its body color changes a lot when it lives, with the bottom white or light yellow; the back is slightly light yellowish brown, and there is a russet horizontal spot in front and back, so it is called "two-spotted ginseng". It is a large edible sea cucumber with thick and tender meat.

Serpentine ginseng is also known as tigerfish, leopard fish, spotted fish, etc. It is dark gray on the back, with a dark brownish color. It is dark gray on the back, with yellow snake eye-like markings, arranged in irregular longitudinal rows, living in tropical coral reefs with a few seagrasses on the sandy bottom, at a depth of 6-18 meters, the meat is fat and tender.

The topaz ginseng is the best quality of the light ginseng. Topaz ginseng is mainly produced in the South China Sea, cylindrical, slightly flat ventral surface, earthy yellow, the back has many wart-like protrusions. The content of saponin in yellow jade ginseng is higher than that of ginseng, and the acidic mucopolysaccharides are moderate, with better medicinal value, which is more suitable for the middle-aged and the elderly, and the weak patients.

Spoked-anus ginseng, also known as stone ginseng and cucumber ginseng; white-bottomed spoked-anus ginseng, also known as boot ginseng and chigua ginseng; and black-wrinkled spoked-anus ginseng, also known as wu ginseng, are all three kinds of large-scale edible sea cucumbers living in the waters of the Paracel Islands and Spratly Islands, which are of better quality but lower in production.

Also, there are black sea cucumber, jade foot sea cucumber, black milk cucumber and brown sea cucumber, which are common edible sea cucumbers in the South China Sea with lower quality.