Our experiences with RTC and ARTC are thoroughly reported in their corresponding threads. I'll be happy to try answering questions that these threads do not address.
Our true ARTC came from Rouben @rmkblades in March 2016 at about 14". In Rouben's hands it presented no problem at feeding, even took down some tank mate cichlids. In my hands, it's a totally different story. I've been struggling greatly to feed it. It refuses the meals ~ half the time and...
You have seen them featured prominently throughout many of our videos of the "aggressive" 4500 gal but I realized they have no thread of their own. So here it is. Ten RTC. 2.5'-3.5'. Three biggest are all males (flat and wide head versus females). Alpha is 3.5' and is missing a second ray...