I bought a baby Suncatfish the same time as a baby Red Oscar and a baby albino Senegal Bichir and the Oscar and Bichir have tripled in size but my sun cat hasn't seemed to grow much at all. I see him with a belly full all the time. I feed him Tilapia, Scallops, Shrimp, Red Worms, shrimp pellets, fluval bug bites. Are they just a slow growing fish???