When i got my black it wasnt planned. So i called my friends sisters cause i knew she wanted my african cichlids. I had a tank of about 5 africans, a catfish, and a rhino pleco. She said she would come get them tommorrow, I figured one night would be ok. The rhom was under 2 inches, the cichlids were all around 5 inches. I was actually worried about the rhom. soon as i put him in he went and hid. Turned out the lights and went out for the evening, I came home around midnite, 2 cichlids dead, other three missing tail fins. The next morning the other three were dead. The catfish was about a 8 inch channel cat. and the rhino pleco was like 4 inches. he left them alone for a very long time. 4 or 5 months later i came home one day and the channel cat was ate up, tailfins gone. He left the pleco alone for over a year then one morning i woke up and the pleco eyes were gone and it was eaten out from underneath. anyhow point of the story is even tiny they are brutal.