07-21-2010, 04:05 PM
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Originally Posted by Tyyrlym
Interesting, the profile suggests that the only real visible difference is that females are thicker. I've read that males are universally black though while females have gray bellies. I've always called mine a female because she is a chubby fish and has a gray belly.
Thanks for mentioning this. I just checked back through my normal sources and one does mention this, and another mentions females having a less-pointed dorsal, though this is unreliable. Others don't.
As you have experience, do you think either trait is reliable? I could always say "some authors say..." to make it less absolute, that's acceptable.