Someone posted in a thread about cat treats that they had learned not to feed tuna to cats because of mercury contamination. I learned years ago that tuna for cats, that is, canned tuna, was not good because there was something in the way it was packed that would rob the cat's system of taurine and that that could even be fatal.
Then, I started to see catfood with tuna that had taurine specifically added. Recently I made friends with a gal who has numerous cats and has taken care of many others, and she does a "tuna night" for her resident FeLions every few weeks or so, where they all get tuna for dinner as a treat.
So I guess there is a wide range of opinion about tuna for cats! I'd like to hear from some others what you know about this and what some more recent information is if anyone has access to it. Googling is all well and good but, as we all know, just because something is online doesn't mean it's accurate. So sharing experience and information sources is a good thing to do I believe, especially where our pets' health is concerned.