I was going to put this thread in the unhealthy part but it's really focused on the attacker. Lately, my female gbr and my amano shrimp have gone missing.. This morning I found my one of my cory catfish on his side, fins torn and his side was all bloody.. He could hardly breathe so I had to put him to sleep he was a real state.. Lately my corys have been chased by my red tailed black shark.. So have my kissing gouramis and also my cuckoo catfish, he has all of a sudden turned so aggressive as normal with red tails and I suspect that he done this to my cory, here's a picture of the poor guy. I just want to confirm that this was the red tail, he's being rehomed, he's in the breeder net at the moment.