Ten inch mala (I think) has murdered two small plecos, a northern pike, small Rapheal catfish, and forced me to move a ten inch oscar and a seven inch jag. I caught a blue gil and a crappy for sacrificial reasons and now I have two new tankmates, he chases them on occaison. I'm going to try three rbp two medium plecos a large Rapheal catfish and some small tetras. 120 gallon