I’m going to have to vote on the snakehead. Those fish are awesome, and like stated earlier, I wish we could keep them in the U.S. The gulper seems pretty cool as well, especially a group of them.
Maybe silver datnoid polota would be a good species, would need to be above 3" to avoid becoming a meal as they grow slowly.
Possibly two nemurus and 4-5 silver days, they don't pass 10" apparently
Not entirely sure on them species but I believe I have gone of the numerus as have done some research and apprentkey there one of the most aggressive cats you can have and everyone's had bad expience with them killing there fish that are even bigger then them what catfish are as pretty looking as one of them and aggressive but can be housed with other fish
Nemurus can live with other fish, those reports are old, many of us have kept them with zero aggression Inc
thebiggerthebetterfollen me a few others on YouTube.