one of my new females seems to have an injured pectoral fin?

[chrissylee13]

i just noticed that she only uses her right pectoral fin while swimming. she uses the left a little but mostly the right. the left looks to be a little shorter than the other and smaller. is it possible that she injured it some how? or maybe she was born that way? also, is there anything special i can do for her? she's eating just fine and it doesn't seem to be bothering her.

[Olympia]

I think it should grow back as any other fin grows back :)
As long as it doesn't bother her, I wouldn't worry too much.