Hey guys! I was wondering what kind of catfish would go nicely in my 75 gallon turtle tank. It has a 4 1/2 inch RES, a 2 1/2 inch pink belly side neck, and 2-1 inch long Jack Dempseys. I would prefer the cat to only grow to the 75 gallon size. I want them to be aggressive enough that they will defend themselves against my turtles, but I also don't want him to kill them either. Thanks for your help guys!!