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.
Well planted aquariums are not only great looking, they are also very beneficial to the fish. They oxygenate the water, absorb nitrates, reduce algae and provide refuge for fry (and other timid species). Plants like Java fern, hornwort, Amazon sword, Vallisneria (eel grass), Cryptocoryne and Anubias can all do well in a typical home aquarium with the smallest amount of attention