No, Menagerie can attest to that!
They are not super aggressive in terms of how many cichlids can be, but they are definitely spunky. When I was setting up my group of 2 pairs I put 5 babies in the tank and wound up with 2 pairs, and the leftover fish was pestered mercilessly. They are very fast and would come out of nowhere to attack. He was pinned up in the corner 24/7, so I removed him.