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Pisces Ale
Fundulopanchax sjoestedi (blue gularis), mikrogeophagus ramirezi (blue ram cichlid), Pantodon buchholzi (African butterfly fish), Xiphophorus helleri (swordtail), Poecilia reticulata (guppy), betta macrostoma (spotfin betta), peacock goby (Tateurndina ocellicauda), Carassius auratus (fancy goldfish), Synodontis multipunctatus (cuckoo catfish) come to mind. All three criteria should be met.
If you look further into the genuses of fundulopanchax or its cousin the aphyosemion you should find the best lyretails in the hobby. Synodontis catfish have a variety of patters but generally have a neat flag tail. Rams, goldfish, and the live-bearers selected have been bred to express all manner of different traits similar to dogs. Betta macrostoma and the butterfly fish are oddball fish that are pretty.