Shrimp, an arthropod living in water, belongs to arthropod crustaceans, and there are many kinds, including Antarctic red shrimp, green shrimp, river shrimp, grass shrimp, prawn, prawn and lobster. Shrimp has high nutritional value for dietotherapy and can be used as Chinese herbal medicine.
Shrimp is a crustacean decapod swimming suborder with nearly 2000 species, most of which live in rivers and lakes. They all have beards, hooked noses, jointed back arches and hard scales at their tails, so they are good at jumping. Many kinds of food are important. The size varies from several meters to several millimeters, with an average of 4 ~ 8 cm. The big one is called prawn. Bending the abdomen and tail can swim backwards quickly. Eat tiny creatures, and some eat carrion. Female shrimp can produce 1, 500 ~ 1, 4000 eggs, which are attached to swimming limbs. There are five stages of development before adulthood. Its seeds are outside the abdomen, which tastes fresh and people like to eat them. Shrimp is long and flat, with a calcareous exoskeleton, which is divided into two parts: chest and abdomen. The head and chest are covered with carapace. The abdomen consists of seven body parts. There is a serrated forehead sword and 1 double rotatable compound eyes with handles at the front end of the head breastplate. Shrimp breathes through gills, which are located on both sides of the head and chest and covered by crustaceans. Shrimp's mouth is at the bottom of the head and chest. There are two pairs of antennae in the head and chest, which are responsible for smell, touch and balance, respectively, and a chewing device composed of the lower jaw. There are also three pairs of jaw feet on the head and chest to help contain food, and five pairs of walking feet, which are mainly used for hunting and crawling. There are five pairs of swimming limbs and a pair of stubby tail limbs in the abdomen. The tail limb and the last abdomen are combined into a tail fan, which can control the swimming direction of shrimp.
Shrimp can be divided into seawater shrimp and freshwater shrimp according to different producing areas. Sea shrimp is also called red shrimp, including lobster and prawn. Among them, prawn is the most delicious and is a famous seafood product. The common European shrimp in the North Atlantic is about 8 cm (3 inches) long, gray or dark brown with brown or red spots. Penaeus monodon is distributed along the coast from North Carolina to Mexico. Length18cm (7 inches); Larvae live in shallow bay, and then enter the deep sea, eating small animals and plants. The above two species have important economic value with brown ditch shrimp and pink ditch shrimp. Klingon is a kind of prawn in the Pacific Ocean. Freshwater shrimps, such as Charybridae, mainly live in warm areas, and some are in brackish water; Some are as long as 20 cm (8 inches). Ataephyra desmarestii is 0/.6 ~ 2.7 cm (0.6 ~ 1. 1 inch) long, distributed in fresh water areas of Europe, North Africa and the Near East, and lives in groups among aquatic plants. Syncaris (2 ~ 5 cm long [1 ~ 2 inches]) and Palaemonias ganteri (half the length of the former, only found in Mammoth Cave in Kentucky) in California are famous freshwater prawns in North America. Swordtail fish is a freshwater fish distributed in the West Indies. Macrobrachium or gibbon is edible and mainly distributed in tropical areas. Alfeus can grow to 3.5 cm (1.4 inches), and its prey is stunned with its big claws. The red sea drum shrimp and goby live in the same cave, and the fish sends a dangerous signal to the shrimp through physical movement. The tropical narrow-scale fish is 3.5 cm (1.4 inch) long. The coral fish swims backwards from its claws, and the shrimp cleans the dirt on the scales. Fairy shrimp is similar in shape to shrimp, but belongs to Anostraca. Transparent is the shrimp that has just grown.
China has a vast sea area, many rivers and lakes, and is rich in sea shrimp and freshwater shrimp. Shrimp is a delicious and nutritious seafood, which can be used to make all kinds of delicious food. It has the reputation of "licorice" in dishes. There are Antarctic red shrimp, prawn, prawn, Neoprawn, anglerfish, lobster and so on. Green shrimp includes green shrimp, river shrimp, grass shrimp and so on. There are salted shrimps such as white shrimps.