Can a channel catfish do this? This is the only fish i suspect since it only has 4 corys in there as well. The wolf also has a few white spots on each side. More like a patch, one spot not a few small ones. I have since removed the catfish from that tank. I have seen them fight for a spot under the drift wood, but nothing major until now. The wolf seems ok other then the white spots and the nipped fins. The wolf is around 4 in and the cat prob around 5in. Is this the problem or should i look into something else for the safty of my fish?

