
its located right in front of his tail and it it only on one side, its about the size of his eye, across and height wise, it does not seem to be bothering him any.
it just looks like an irregular bump, also the skin around it is wrinkled.
info: i just bought all 6 f8 puffers 1 week ago, when i bought them they were all in fw and i have been slowly bringing the salt content up to brackish, as of right now it barely reads over 1.000 maybe 1.001.
All of the others seem to be doing good.
i am not sure if it is some kind if parasite or if he just got bitten there before. I will be keeping an eye on it to see if it gets any larger or changes in any way.
well hopefully it is just a scar that i have not noticed before.