I have a small goldfish bowl, the guy at the store said I could have 2 small fish in it. I have a filter too. I am going at some point in the week to buy the fish, but I'd like some ideas. I want ones that will be easy to care for, not too expensive (less than £5 each) and that look pretty. I'd also like it if it were a species that either comes in different colours, or would have identifying marks, so I could tell them apart.