An eel scientifically known as Anguilliformes is a fish consisting of ray fins which belong to the Actinopterygii family i.e. family of eels in freshwater. It has 8 suborders, 19 families and 119 genera, and somewhere around 800 species. Eels have various intrinsic and extrinsic characteristics which alter and develop when they grow physically. Eels have an elongated structure (long length fish) with a length ranging from 5cm to 4m and weighing from 30g-25kg (in adults). Eels swim by generating waves from their body structure .they can swim in both forward and reverse directions forming body waves. They generally reside in deep waters or sea in holes called “eel’s pit”. Some of the eels may stay at freshwaters but they too will come back to the seas for breeding. There are two types of eels that are commonly seen one is deep-sea spiny eels and the other is the electric eels producing an electric current of high voltage. Both these characteristics of eels help them from protecting themselves from predators. This review paper considers the lather characteristics of the eels of producing electric current using their own intrinsic characters and how they behave during the act of producing current