I have an extra 20 gallon long and I really want to get into aquariums. I have little experience in fish keeping but I have been keeping reptiles for years (though that doesn't help me much here). I want to put some really cool fish in my extra 20 long. I want to get fish that are really creative and different (nothing boring!) but also nothing too advanced. I really like big fish so they can be included, I've got plenty of room to upgrade my tank when fish begin to outgrow the 20 gallon. I have had people suggest axolotls and african clawed frogs. I may get some further down the line but I am really looking for fish right now. I would really love a red tailed catfish but they get BIG haha and I'm not sure if I am ready for that just yet. So mainly I want fish that get somewhat big and are really different. Any and all suggestions welcome!