Humpbacked Zebra Danio?

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ConVex

Aquarium Advice Apprentice
Joined
May 18, 2018
Messages
13
Ive had this one zebra danio for what seems like forever, I purchased some tank mates and noticed that my original fish had a humpback compared to the others.
I dont see any clamped fins or another signs of disease. This is not new and it was there before the other fish were introduced. (I apologize for the poor quality photo, I just snapped this off with my phone.)

This is not an "emergency" It doesn't really seem to affect her, appetite has never changed and she successfully fought off a bought of ick a month ago.

Basically I'm just curious if this is simply a deformation or a health concern. Thanks in advance.
 

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