well so many experts have different opinion regarding tropical fish n goldfish/koi, but the way i see it, most of them have been bred in an aquaria, ironically most of the fish tht we house in our lovely aquariums might not have any idea abt their natural habitat, All these fish have been bred in aquaria for generations.
most importantly many fish do very well in the temp range 17-29 C, can't say abt the other params... so can't we jus consider them to b an aquarium fish rather than classify them to be a tropical or sth else...
most importantly many fish do very well in the temp range 17-29 C, can't say abt the other params... so can't we jus consider them to b an aquarium fish rather than classify them to be a tropical or sth else...