I love their long flowing fins, bright bold colors and equine snout. When healthy and happy, the dorsal fin can grow to three times the length of their body!
There was an article published in FAMA about the same time that St. Pete Marine opened with a dozen Moorish Idols. The author concluded after 8 attempts that Idols are too difficult to keep. Yet Idols thrive in large public aquariums with many other fish.
Fish that are very difficult to keep in other systems have thrived in algae-based refugium systems. Angelfish, butterflies, anthias, fairy wrasses, clown tangs, and even Moorish idols have done well in this system. (The Natural Mud-Filter Method, by Mike Paletta (Tropical Fish Hobbyist, April 2001)