Keep him. I had a beauty that I traded last year, he was 15" and around 7cm thick at the head. The store I traded him to put him in a 270g pond, with a large plec and a large male synspilum, who attacked him when they put him in, he took a few shots over the course of about 5 minutes then, when he got his orientation back he opened his mouth charged the synspilum and took it's entire head in his mouth and started shaking it about!!! It ended up in a back corner with the plec. They also said the other fish in the tank a 22" TSN might do him some damage during the night, I said I doubted it. I phoned the next day and they said when they looked in the morning the TSN was SHREDDED and cowering in the corner with the plec and synspilum, while the butti swam around the entire pond like "this is all mine". A week later a young guy traded a 11" dovii, he told them with authority that it would stand up for itself "no problem", the butti KILLED IT within 2 hours. Last time I went in to see him they showed me him a) leaping from the water for food 6) attacking the front glass and jumping from the water to bite anyone who put a hand over the pond! I shall try to post some pics of him soon. He's now about 16.5" and they love him. People rave about the aggressiveness of jags, dovii, wyckii, micropeltes, aros, hoplias etc but big buttis will take on anything. Needless to say I totally regret that trade in....