have you not read any of the replies anyone posted answering your question? with most new world cichlids you will be able to put at most a pair in there, there are some smaller growing cichlids that you could put maybe 3-4, the word "fish" is one of the most general terms you can use, it could refer to anything from a guppy to an arapaima to a white shark. people have given you some suggestions so research those and see what you like, other than that, you will get better advice if you give us a list of fish that you are thinking about and like and seeing what combo can go in that tank