Can gars get depressed? I had a 7 inch and a 12 inch spotted gar living together in my 220 gallon. The 12 incher grabbed one of my dats and got the dat hung in his mouth. I pulled the gar out because he was too big for the present time and replaced him with a 6 inch silver Aro. Now the smaller gar acts totally different. He lays on the bottom more and spends a lot of time on the oposite end of the tank from where he use to stay. He is still eating but has lost some of his feeding aggression. The aro stays clear of him or from what I can tell. I don't know if he is acting different because I took the gar out or because I put the aro in.