Yellow Tang lateral line mutation

[Bigreefer402]

This is my one and a half year old biota yellow tang. He has always had this abnormal deformation with his lateral line where it disconnects. Also his pelvic fins have withered away. He has always been heavily fed and has never been sick. Any thoughts?

 

[Bigreefer402]

I understand the whiteness around his face. It was way worse when I got him.