lets just put it this way, pictus catfish are predators, they swim and prey on little tetras (see those long whiskers they use these to hunt) the pictus catfish is ready to pounce. and its even worse during the night... the truth is that if you want to own a pictus cat make sure there are no small fish in the tank to prey on. speaking from experiencing i had a pictus and i had several small tetras and they all went missing... i put two and two together and that was the end result... but i must say the pictus is an awesome looking fish!!!!