I love these type of Sharks. All mine have been aggressive though. I've had a Black Shark, 3 Red tails and currently have an Albino Rainbow. Next I may try a flying fox next as I'm seeking a peaceful one of this type of fish.
Keyholes might get a doing from the shark, but it could work in that size of tank I reckon. My keyholes haven't bred again for meThanks btw, he/she is a keeper. Him and the 4 giant danio and Cory cats make that tank for me. Oh and my little spotted pictus... Tempted to shift out my grow outs and add a pair/ group of keyholes