My Midevil (Midas/ RD) has an awesome personality. He's a mean lil' guy but he's very active. He was very shy at 2" when I first brought him home. It took him about a week to relax and swim around and not hide from me. A few months later and he's about 6" and thick. He doesn't take to kindly to anyone near his tank. Their is a 2ft invisible barrier around his tank that he thinks of as his territory. Anyone that crosses it is met with a quick attack on the glass, gill flaring, biting, and sand spitting. He also goes after my Python Hose during water changes. He is my favorite fish. If you are going to keep more than one, make sure that you put them in a large tank. If not they will violently go after each other and tankmates as they mature and grow. They are very interesting cichlids but can be very aggressive. Red Devils tend to be more aggressive than Midas...usually.