The electric eel can form a voltage as high as 800V, only because of the special structure of the cell, it can greatly change the ion flow inside and outside the cell and form a current when it encounters external stimuli. Whole body cells are equivalent to multiple batteries connected in series, so higher voltage is generated.

Electric eels have special cells on both sides of their bodies. Usually, the positive and negative charges of these cells are equal, which is electrically neutral. When the electric eel wants to attack other creatures, it will send a signal to these cells, and each of these cells will send out a voltage of about 0. 15V.

A battery cell is equivalent to a battery, and the voltage of 0. 15V is really too small, but there are many such batteries, and it is said that there are thousands. These batteries are regularly arranged together, which is equivalent to connecting the batteries in series. Because the voltage of series batteries is equal to the sum of the voltages of series batteries, the voltage used by electric eels to attack other creatures will be very large, generally 300 ~ 400 V, and the highest can reach 700 ~ 800 V, not to mention some small aquatic creatures, even human bodies or other large creatures.

The acquisition of this ability of electric eel is only due to the change of the gene pool of electric eel caused by environmental changes, which makes its offspring have this ability. There are 18 kinds of electric eels on the earth, but only South American electric eels can discharge quickly, and different environments have shaped different abilities. The discharge ability of electric eels can make it easier for them to prey on some smaller animals, and also help them escape from some large animals.

The unique ability of living things is not low-level or high-level, but only the performance of living things adapting to the environment. Just like human beings, we have gained a developed brain in the long-term evolution, but it has brought about changes in gastrointestinal volume, digestive ability and instantaneous explosive power of the body. The developed brain makes up for some shortcomings of the human body, and the application of teamwork, tools and fire enables human beings to catch more food.

It used to be thought that biological evolution was a change from low to high, from low IQ to high IQ, and from simple to complex, but it was not. Life has become more and more diverse in the long-term evolution process, and biodiversity has also confirmed the impact of the environment on species.