permit size

Question
Is there a difference between male and female permit?   

                                 Thanx

Answer
Aloha Sal.....
    Well, you must get the prize for one of the most challenging questions yet?
    I do not know the answer. I most probably would not be able to tell the difference in the water for sure. But even after getting one in the boat it might be hard. Your question has aroused my curiousity evn more. The Jack Family Carangidae of fish, I look at the forehead the most, if it is blunt I pronunced then its most likley a Male.
Check Out This site:

http://www.flmnh.ufl.edu/fish/Gallery/Descript/permit/permit.html