Missing dorsal fins?!

Mr.Midas

AC Members
Jul 18, 2008
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Kingston, NewBrunswick, Canada
So I was looking at my convict fry which are about an inche long now and i noticed that one of them was missing the spines of its dorsal fin, i just assumed it was a birth defect and though it was pretty cool. But now i've noticed it on a few fish and a couple of them have just a few spines missing. The wierd thing is that there arent chunks missing, it looks like someone cut them off with a razor blade :S Has anyone ever heard of that?
 
are your convicts from the same batch who are breeding you might have an inbred problem there
 
id say some one is biting them off but clean enough that you dont notice the little teeth marks
 
no there in with perch i know that for sure. i cant remember what else
 
ahhh i thought we were talking about his 55 i do believe there alone
 
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