Beautiful fish, the male tends to be a yellow/silver and the female blue/black/silver,very long streamers as well, they are diomorphic and can change from female to male, supposedly reef safe/compatible being a planktivore...getting mine in a month...after a very long wait..one thing to be watchfull of, they are a deep water angel and if brought up from the depth to quickly they can experience swim bladder issues,
HTH