I recently saw a new to me family of cats, called ageneosus marmotus or something along those lines, sorry if its spelled wrong haha. They look like mini whale sharks to me I like em a lot I may get one, I like predatory streamlined catfish, things like blue cats are very derp looking haha. Be careful with the cats they can usually eat things larger then you think haha.
(Not to defame or promote random buisness but they're for sale on aquascapeonline, who I got my ornate bichir from and it was handled great)
I would love a red tail if I had a pond, I'd love it, or a tiger shovelnose. Im kind of an amazon freak tho haha I rarely consider fish outside of that area.
Electric cats are fascinating but you'd need a specie tank for those
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