Along the same lines as 'what are unusual/less common cichlids', I'm curious what oddballs everyone is keeping. Or what are your favorites.
E.g. hard to find catfish, weird fish, brackish fish, etc.
My current favorite and harder to find oddballs it would be my orange chromides...which could technically go under 'old world' but are not African but Asian. And their tankmates the glassfish that are hard to find in their natural unpainted form. Along with a few bumblebee gobies (in a different tank).
In addition to those, some of my favorite oddballs include a panda garra, an African glass catfish, African brown knife, African leaf fish, and a few bichirs - a 1+ year old senegalus about 6-7", and then two juvies, a 2" senegalus and 2.5" palmas. And I really like my GSP and Fig 8 puffer, but those are pretty easy to source. Maybe someday I'll try a red eye or arrowhead puffer.