Grass shrimp is a river shrimp, freshwater shrimp, the scientific name of the spotted prawn, also known as the black shell shrimp, belongs to the shrimp family. As the shrimp like to inhabit the water and grass places, so called grass shrimp. Grass shrimp with fast growth, miscellaneous food, wide salt, short breeding cycle, large individuals, meat flavor, nutrient-rich, adult shrimp production and other characteristics.

Sea shrimp and river shrimp difference:

One, the appearance of different

1, sea shrimp

Sea shrimp body long, flat on both sides, females are about 18 to 24 centimeters long, males are slightly shorter, transparent body, female brownish-blue, males are slightly yellow; body clad in crustaceans. Thoracic armor is harder and wider, the anterior end of the central extension of the long and pointed sword zygomatic, the upper edge of the 7 to 9 teeth; the lower edge of the 3 to 5 teeth.

There is 1 pair of eyes with stalks on both sides under the sword zygomatic, and 5 pairs of appendages on the head, the 1st and 2nd pairs of which become two pairs of whip-like antennae, the 2nd pair of which is very long. The other legs, 3 pairs, become 1 pair of large jaws and 2 pairs of small jaws, which are part of the mouthparts.

Thoracic appendages 8 pairs, of which 3 pairs become ball-footed, part of the mouthparts, and 5 pairs are steppers, the first 3 pairs of steppers ending in pincers, with the 3rd pair being the longest.

The last 2 pairs end in claws. Abdomen 7-segmented, distinctly segmented, capable of flexion; 6 pairs of abdominal appendages; 1st pair of female endopods very small, becoming genital in males. The 6th pair are caudal limbs, thick and short, and the 7th abdominal caudal segment is synthesized into a caudal fin.

2, river shrimp

Elongated body shape, 1.5-3cm long, the whole body consists of two parts of the cephalothorax and abdomen. Cephalothorax segments jointed by the thoracic or dorsal armor covering the dorsal side and sides, the cephalothorax is thick, the rear part gradually thin and narrow.

The frontal horns are situated in the center of the anterior segment of the cephalothorax, with a flat upper margin and a sharp end, the dorsal armor has a sword-like protuberance at the anterior end, the upper margin is covered with 11-15 teeth and the lower margin with 2-4 teeth, and there is a hard outer shell on the surface of the body, and the whole consists of 20 body segments.

The head has 5 segments, the thorax has 8 segments, the abdomen has 7 segments, and there are 5 pairs of footsteps, 2 pairs of which are pincer-shaped, and the last 3 pairs of which are claw-shaped, and the appendages of the 6th abdominal segment have evolved into a powerful tail fan, which serves to maintain the balance of the body of the shrimp, and lift up and down and backward.

Two, different living environments

1, sea shrimp: living in the shallow sea on the bottom of the mud and sand, not very active during the day, often lurking in the mud, the night is very lively, from time to time to swim to the sea water in the upper and middle layers, prey on other planktonic small animals. Distributed in the Yellow Sea, the Bohai Sea and the sea area north of the mouth of the Yangtze River, a Chinese specialty.

2, river shrimp: inhabited in rivers, lakes, streams and ditches of aquatic algae, grass, are distributed throughout the country.

Three, different types

1, sea shrimp: shrimp, prawns, shrimp, pipa shrimp, lobster and so on.

2, river shrimp: green shrimp, grass shrimp, crayfish and so on.

Baidu Encyclopedia - Grass Shrimp

Baidu Encyclopedia - Sea Shrimp

Baidu Encyclopedia - River Shrimp