近来,上海农贸市场上常见一种甲壳坚厚、头胸甲和螯足膨大的活虾出售,兜售者称之谓“龙虾”,其实非也,它的名称叫“淡水螫虾”。龙虾是一种大型虾类,生活在海底,我国南海有出产,它与螯虾在分类上分别属於两个族,因此不能混淆。淡水螯虾原产美国南部,大约在50年前被引入日本和我国。这种虾的生命力极强,在河浜、污水沟中均 Recently, the Shanghai farmers market, a common hard shell crustaceans and chelated mackerel expansion of live shrimp for sale, the seller said the so-called “lobster”, in fact, also its name is “freshwater shrimp.” Lobster is a large shrimp, living in the sea floor, China’s South China Sea have produced it with the crayfish in the classification belong to two families, and therefore can not be confused. Freshwater crayfish native to the southern United States, about 50 years ago was introduced to Japan and my country. The vitality of this shrimp extremely strong, in the river Bang, sewage ditch are