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The fish you are refering to as a "Japanese fighting fish" does not exist. There are no fighting fish that come from Japan. Japan is a cold country not a tropical one. The Koi Carp were developed in Japan. The fish I THINK you mean is the "Siamese fighting fish" more correctly the "Betta splendens". Yes they do fight but only the males fight and they will only fight against another male of the same species.

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15y ago

What else can I help you with?