Not really, not without venting them, but checking for a pattern on the fins has worked out pretty well for me. Females usually lacks a defined pattern on the fins, males on the other hand get that pattern quite early as you can see on the pics above.
Check the beginning of the thread below where I explained the differences a little further.
http://www.predatoryfish.net/ibforums/index.php?act=ST&f=24&t=46787&st=0
Check the beginning of the thread below where I explained the differences a little further.
http://www.predatoryfish.net/ibforums/index.php?act=ST&f=24&t=46787&st=0
