Sexing a Niger Trigger?

[shoimen]

Does anyone know how to determine the --- of niger triggers?
I've heard that the length of the tail streamers may have something to do with it, but am wondering if anyone has a more definitive answer.

 

[guineawhop]

most saltwater fish in the trade aren't sexually dimorphic. i think these guys aren't either, but they may be able to change ---, but this is just a guess. a lot of saltwater fish can change their --- like some angels, clowns, some goby's.