Ripped tail

[Eoin OD]

Hi all
I noticed my 5 month old axolotl has chunks taken out of the top of his tail he is by himself in the tank so another axolotl didn't cause this.

I think it happens from loud noises or sudden light change.

I would really appreciate any replies ,Thanks

 

[Eoin OD]

 

[AMurry24537]

View attachment 89243

Remove or sand down any sharp edges and, if possible, upgrade to a larger tank with more space to swim around