too much?

so eating fish is good for you... it's brain food (does that mean zombies eat it?) and people even take fish oil supplements.... but is there a limit?  can you get too much of a good thing when it comes to eating fish?

I've been eating tuna salad sandwiches every day this week... is that good for you?

I'm gonna do a little research and let you know what I find out.  stay tuned!