How to classify prawns by footstep morphology

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Hello kiss from the characteristics of the feet to distinguish the shrimp swamp shrimp lobster crow river crab, the following is the relevant information: shrimp bright dan round river prawn: they have 8 pairs of feet, 2 pairs of forelimbs, and 6 pairs of hind limbs, and their feet are often a rough bacterial-like structure.

Shrimp lobster: They also have 8 pairs of feet, 2 pairs of forelimbs, and 6 pairs of hind limbs, but their feet are more delicate than those of shrimp and river prawns, and have a certain spiral structure. Shrimp River Crab:

They have 10 pairs of feet, 2 pairs of forelimbs, and 8 pairs of hind limbs, and their feet are often in an elongated, spiral-like structure.

Penaeus monodon is the largest individual in the shrimp genus, also known as nine-node shrimp, flower shrimp, ghost stick shrimp, etc., in the biological classification belongs to the biological kingdom, arthropods, molluscs, decapods, shrimp family, shrimp crustaceans, generally 350 400 grams of individuals, larger individuals up to 500 grams, with strong edible value and economic value.

The epidermis of Penaeus monodon is smooth, the shell is slightly thicker, the body color of the fish is reddish-brown, light brown, dark cyan or light green, there are 9 white transverse bands on the body, the forehead is straight, the end is thick, slightly bent upward, the cephalothorax has tentacle grooves, cervical grooves, tentacle spines, liver spines, gastric spines, the 1st and 4th pairs of feet have outer limbs, the 5th pair of feet have no outer limbs, the tail segment is slightly better at the 6th segment, the tail end is pointed, and there are no lateral edge spines.

Penaeus monodon is widely distributed in Asia, Europe, Africa, Oceania and North America, including China, India, Pakistan, Sri Lanka, Malaysia, Thailand, Australia, Japan and other places, and China is mainly distributed in Zhejiang, Fujian, Taiwan, Guangdong, Guangxi, Hainan and other places, especially in the eastern, southern, southwestern and Qiongzhou of Hainan Island.

Environment: Penaeus monodon is a marine crustacean, adult shrimp live in muddy or sandy deep sea, inhabit the deep depth of generally within 60 meters, young shrimp and juvenile shrimp live in shallow water along the coast, often a large number of clusters in the middle of aquatic weeds or adherent weeds.

Carnivorous: Penaeus monodon is omnivorous, of which animal food is mainly bivalves, monovalves, long tails, short tails, rotifers, etc., small fish species, etc., and plant foods are mainly algae and branches and leaves, fruits, and debris of aquatic flowers.

Breeding: Penaeus monodon is an oviparous shellfish, dioecious, test-tube baby, the breeding season is 3 November, with 7 September as the peak period, the female shrimp is pregnant with 30 1.2 million eggs, the water temperature is 27 29, and the salinity is 29 and hatches into nauplii in about 20 hours.

In terms of price, the giant shrimp will naturally be scarce and expensive due to the strict regulations of the growing environment. Therefore, the price of giant shrimp is a little expensive. In most areas, the price of giant shrimp basically fluctuates around 120 yuan a catty.

The price of grass shrimp is already relatively cost-effective, and it can be bought at about 30 yuan.

Giant prawn, also known as black tiger prawn. Judging from the appearance of the giant shrimp, it has obvious red and yellow lines, which is also a major feature of the giant shrimp. But in the case of grass shrimp, you can only see the horizontal texture on the grass shrimp, which is quite average.

Penaeus monodon has a smooth skin, a slightly thicker shell, and a reddish-brown and light brown body color, which is widely distributed in Asia, Europe, Africa, Oceania and North America, including China, India, Pakistan, Sri Lanka, Malaysia, Thailand, Australia, Japan and other places.

It belongs to the giant shrimp and is mostly distributed in India, Sri Lanka, Pakistan, Thailand, and Australia.

The body is slightly flattened, the carapace is thicker, and it generally grows in places with a lot of seaweed.

The body of the shrimp is composed of many body segments, with an exoskeleton on the body surface, and the feet and antennae are segmented, and it belongs to arthropods

So the answer is: