They are also known as "clearfin" lionfish, notice on the tail anal and dorsal fins, there are no spots, both on mine and the pictures that Chandler posted from Conogre.
Sometimes the juvenile P. russelli will have a few spots around the edged of those fins, but adults will not. Chandler04 your's look like a P. volitans, exactly how big is it? I ask because on Pterois lions the pec fins are always longer relative to body size the younger they are, as they grow the length of the pec fin 'streamers' do not grow in correlation, they "grow into their fins" so to speak.
hth,
bb