欧鳗作为一种新引进的养殖品种，在日本鳗苗匮乏的今天．正日益在国内普及推广。然而较之日本鳗，欧鳗有着显而易见的弱点，主要体现在生长差异大，据统计生长缓慢的欧鳗占50％以上．严重影响欧鳗的养殖效益，因此减少鳗尾比例，改善欧鳗生长缓慢症已成为养鳗业主亟待解决的问 European eel as a newly introduced breeding species, eel shortage in Japan today. Is increasingly popular in the country to promote. However, compared with Japanese eels, European eels have obvious weaknesses, mainly reflected in the large differences in growth, according to the statistics of slow growth of European eels accounted for more than 50%. Seriously affect the European eel farming benefits, so reduce the proportion of eel tail to improve eel growth retardation has become an eel owners need to be addressed