I made the mistake of getting a shark, it ended up not eating, and died in about 8 days.They aren't one of the fish i could see enjoying in my tank, banded cats practically never move, at least mine did not.If you want a cool Fish with great Personality, from my experience, Lionfish, or groupers are the predator to have..in a FOWLR tank, I miss my V-Tail Grouper a lot, I also miss my lionfish too, they are both fish that you will love, that you can both keep awhile.Although, my grouper (Bill), did Hate my Yellow tang with a passion I have never seen before...Both Fun To feed!