DIAGRAM OF THE LIFE HISTORY OF THE COMMON EEL (AngUtUa Vulgaris) 



i. The transparent open-sea knife-blade-like larva called a Leptocephalus. 



2 and 3. The gradual change of shape from knife-blade-like to cylindrical. The body becomes shorter and loses weight. 



4. The young elver, at least a year old, which makes its way from the open sea to the estuaries and rivers. It is 2/3 

 inches long and almost cylindrical. 



5. The fully-formed eel. 



