Giant fish knocks out its opponent with only one blow!

NTD Newsroom
By NTD Newsroom
January 12, 2017Entertainment
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Giant fish knocks out its opponent with only one blow!

Fight-or-flight response is a physiological reaction that occurs in response to a perceived threat. 

The sympathetic nervous system uses nerve pathways to initiate reactions in the body, and the adrenal-cortical system takes charge of the bloodstream. The combined effect of these two systems results in the fight-or-flight response.

In this video, the principle is demonstrated perfectly by two fish. One runs, the other fights.