What is the shrimp stalk in Suzhou supermarket?

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 steamed and fried, and can be used as Chinese herbal medicine. growing environment

Shrimp swimming is very different from fish. Fish can swim forward by swinging their tail fins. Shrimp has no tail fin like fish, only a tail and many calves. So how does it swim? Shrimp also has its "coup".

Shrimp is a good swimmer and can swim long distances with its legs. When it swims, its swimming feet paddle backward frequently and neatly like wooden paddles, and its body drives forward slowly. When frightened, its abdomen bends and stretches flexibly, its tail strokes down and forward, and it can jump backwards continuously at an extremely fast speed. Some shrimps are not good at swimming, and big lobsters spend most of their time crawling on the sand and stones on the seabed.