That's ok, most people (including us, until we did some research) did not realize these guys changed as they mature.
They go from this:
http://villa-tropara.com/2005.8.20%20gazou.jpg
http://www.aquamarinediving.com/imag...ateBatfish.jpg
then to this:
http://www.vibrantsea.net/images/batfish6_floridas2.jpg
then to this:
http://www.gobroadreach.com/_resourc...05115512AM.jpg
and adult:
http://www.scuba-equipment-usa.com/m...x_pinnatus.jpg
The amount of time this takes is unkown to us but when we got our guy, he had a lot more black in the body and fins, so he is already maturing.
