Was going to clean out the tank when I found this and I'm not entirely sure what it could be?
For context, his diet is composed of lettuce and grasshoppers. I recently made the change from sand to walnut shell shavings in his tank so I don't know if that could be a factor.
Any help is appreciated, he seems fine otherwise so I'm hesitant to take him to the vet if anybody else has an idea of what it could be.
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