QUOTE(balashark @ Sep 14 2007, 11:33 PM)

Mrbumblebee, males are usually smaller and slimmer compared to females of the same breed. Also, look at the pelvic fins, which are rounder in females and pointier in males. Finally, males may also have a longer dorsal fin, but that's not always true.
Thanks Justin - I thought you'd know!
Great pictures Jon - you should have entered one of them into the tropical picture contest

Edit: Just noticed you took them today, so would have been too late anyway... make sure you enter next year though.