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.
Should I have water movement in my tank? Fish from faster flowing rivers love swimming against a current - fish from vegetation choked marshes do not. With todays box filters it is quite easy to get some good water flow for strong swimmers like Rainbowfish, whilst a spray bar attachment can completely remove this for gentler swimmers like Gouramis
