Fish keeping does not need to be tropical. Nor do you need to stick to goldfish if you opt out of heaters. There is an enormous array of attractive fish from Europe, North America and northern Asia, southern South America, as well as from elevated areas in tropical regions. Do always keep in mind that many temperate countries have restrictions on keeping non-native temperate species to prevent invasion. Some countries, like the Netherlands, also have restrictions on catching and keeping native fish below a certain size.

Below 10 beautiful fish you can keep without a heater.