I currently have a 46 gallon planted community tank with a steel blue Apisto hybrid, 4 otocinclus, 2 platies, a swordtail, a small angelfish, 3 small 2.5" clown loaches, multiple corydoras species and a Brochis splendens. What I want to know is, would a 4"-6" Xenomystus nigri/African knife fish prey on any of these?