They are, but they arent. I have them with a dg.there was 2 and they nipped the crap out of him and eachother. I bought 6 more of them, and it flipped a switch. They afe now by far the best behaved in my tank. If they still show aggression in the next couple weeks, that would be the best advice I can give. Also, be very careful if u add another dg.
It's always about that time.....