Any of various small, brightly coloured fishes native to tropical waters and often kept in home aquariums.

 There are hundred of different options for you if your interested in getting into home aquariums, you can go for anything from a small and simple tank to huge salt water tanks. You should do some homework on the area you are interested in before you buy anything. You need to consider many things including your budget, the room you have available and the time and effort you want to put in. Not all tropical fish get along together, in fact many feed on each other so if you want to avoid loosing many of you newly purchased specimens you should do some research into what species are compatible with each other.