Most aquarium fish fit into one of the categories below, but some don't. For the full list please see the alphabetical fish index, or search for fish by country of origin.
A biotope aquarium is one that attempts to replicate the natural habitat of a particular species. These aquariums are often more staisfying for the owner, but will also keep the fish happier, allowing them to exhibit their natural behaviour and hopefully reproduce. See more about different biotopes here
