December 20, 2007 at 6:22 am #3927
Unfortunately I do not have any photographs that show the difference in the anal fin of juvenile males and females.
However there are some useful photographs and diagrams by Claire Driscoll available online, which show the difference between male and female seahorses, that you may find helpful. These include illustrations showing the difference in the position of the anal fin, and can be viewed at the following URL:
Best of luck sexing your young seahorses, Chris!