I had a rose queen and she lasted 24 hrs in my tank. She ripped the top lip off of my male flowerhorn in a violent lip lock. They were in a 150 gallon too so it wasnt a space issue.
I watched a 5 inch female splashing water out of her 40 gallon tank at a pet store as she was trying to bite the back of my head as I was turned around talking to someone in the store. They are out of control aggressive.