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在甲壳动物中,尽管有不少被称为“虾”的类群,其经济意义也不小,例如糠虾是鱼类重要的天然饵料,其资源量相当可观,特别在北太平洋,比鱿鱼的资源还要丰富;又如主要分布于南极附近的磷虾,是鲸、海豹、企鹅和多种鱼类的天然饵料,估计蕴藏量达到50一60亿吨,人类若可直接食用,将成为全球最大的蛋白质资源,然而糠虾和磷虾等都不是真正的虾类。真正的虾类体型较大,有5对步足,属于十足目。这个目可分两个亚目,即游泳亚目和爬行亚目。前者包括对虾类、真虾类、蝟虾类;后者包括长尾类、异尾类和短尾类。通常所称虾类,系指全部游泳亚目和爬行亚目中的长尾类而言。
In the crustacean, although there are many taxa called “shrimp”, its economic significance is not small, such as shrimp is an important natural fish food, its resources are considerable, especially in the North Pacific, squid than Another example is the krill mainly distributed in the vicinity of the Antarctic. It is a natural feed for whales, seals, penguins and many kinds of fish. It is estimated that the reserves amount to 5 to 6 billion tons. If humans can consume food directly, they will become global The largest protein resources, however, are not real shrimp, such as shrimp and krill. The real shrimp larger size, there are 5 pairs of walking foot, belonging to ten feet. This project can be divided into two sub-orders, namely swimming suborder and reptile suborder. The former includes shrimp, real shrimp, shrimp hedgehog; the latter includes long-tailed, allotropical and short-tailed. Commonly referred to as shrimp, refers to all the suborder swimming and reptile suborder long tail category.