Video captured the moment of The funny fish swims its head upside down challenging the opposite fish in Bien Hoa, Viet Nam.
According to the fish owner, he was surprised to see his fish like that. As he approached the aquarium he saw a fish with his head upside down and swimming upside down to challenge the fish on the opposite aquarium.
The fish from the opposite tank could only watch but could do nothing.
After provoking an opponent. The fish returned to normal swimming.
This is the breed "Flowerhorn Cichlid". An aggressive breed of fish with a very large head.
So in order to avoid two fish fighting, the man separated them into two aquariums. However, they continue to tease each other.