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Weird "scar" on head

1K views 2 replies 3 participants last post by  Gizmothefreaky 
#1 · (Edited)
On the top of my betta's head is a bit of a scarring... almost looks like the scale has been rubbed off. I know he's had it for over 2 months, and I only really noticed it lately because I replaced the lighting for the aquarium Monday.

I adjusted the contrast/brightness a lot so that you are able to see it... normally, he's a darker blue, and that top part of his head is almost black.

What can this be?

He's not doing anything weird or anything out of the ordinary.


 
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#2 ·
My new Betta has a similar spot on his head. His is more of a small black diamond, but I am curious as to what happened as well.
 
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