Dwarf fish including Guppies and Danios, Corydora catfish, pigmy suckermouths, teams of barbs or tetras If all this hasn’t deterred you, then you'll want to hold some other points in mind before you have a butterfly fish. The most well-liked freshwater sharks are rainbow sharks, bala sharks, and purple-tail sharks. https://pearlaquatics.my/what-aquarium-fish-can-beginners-keep/