Hey Oddball if you happen to find somewhere good to get those least killifish online let me know. I've been interested in a small tank with them but haven't been able to find a good place to get them.
You're joking, right? Though most of the oddballs are brackish, like my puffers and me used-to-be gobies, there are quite a lot of odd fish that can live in 20 gallons and under.
When you say oddball I think silver arowana. Maybe I have been conditioned by this forum. I don't think of puffers as oddball because so many people here have them.