A couple of pics. It won't tolerate anything in the tank. I've tried RD,Jaguar and a Texas. Strangely and thankfully when I do tank maintenance and water change it goes to the other end of the tank and just watches. 12" of attitude.
Not a normal butti.....(Unless they look different sometimes...I have never seen one like yours...) Here is mine...Also looks like an egg laden female to me...