Tuna is yummy and all but...

Can't we just eat some? Do we have to eat the hell out of something until it becomes extinct? I mean really. Do we have to have tuna whenever we want it? Are we that spoiled. Give a fish a break. Besides, it is just chalk full of mercury anyway, and we know how crappy that is. Can anyone else join in on staying away from tuna, at least for the time being? Sole is good too and there's always chicken...