I don't think so, just like with humans once you tattoo heals you shouldn't have any after affects. I do agree that they need to be banned, I can't understand why anyone would think it's "cool".
But fish are not humans... and don't the fish that get tattoed have a shorter life span? IMO its because they have so mutch pain, they just cant take it.
I don't think fish are traumatized in an emotional sense, I mean don't get me wrong what is done to them is horribly cruel and they certainly feel pain, but as you said fish are not humans and everything I've read and observed leads me to believe they don't process emotional trauma as we do. I think the shortened life span could be a result of any infection incurred during the tattoo process. And the fact that no self-respecting fish keeper would ever purchase a tattooed fish, so these are going to inexperienced people who want a living piece of "art", so a high number of deaths could be contributed to lack of proper care.

If you can't find a source I would simply state that you are concerned that the tattooing process will lead to a high mortality rate and that more research needs to be done before this process is allowed to continue.








