There are 10 giant danios and 2 roseline sharks in that tank along with the scats. It was only chasing the other scats, never showed any interest in the other fish. There was def. nipping goin on too. The other scats have alot of fin/tail damage and it looks like maybe alittle on their sides. I added alot of plants hoping to break some of it up but the bigger scat was just non-stop goin after the others. Its now in a tank w/ an angelfish, 3 silver dollars, a ray and an archer (which it likes to hang around) and its not going after any of them.