oddly colored tail tip?

[axolotl nerd]

i’ve always had this little bit on the end of mudkips tail that has been somewhat transparent and white looking. i know it’s not fungus, if that helps anyone determine what it is. i’ve always thought it was just an area that lacked pigmentation but i wanted to be sure

sorry for the odd angle and poor quality, i don’t want to move him

 

[axolotl nerd]

better picture, sorry to bump this but i’m curious

 

[xxianxx]

Just looks like its been damaged or nipped and regenerated.