You will turn into a dolphin in 7 days
Diggity dig dig.. hmm
http://www.sciencenews.org/view/generic/id/59035/title/FOR_KIDS_The_mercury_in_that_tuna"The EPA recommends that fish not contain more than 0.5 parts per million of mercury. The tuna from restaurants had 0.75 parts per million, on average, and some restaurant samples had levels as high as 1 to 2 parts per million. These numbers may seem small, but long term ingestion of even tiny amounts of mercury can lead to heart or nervous-system disease.
But solid and chunk-white types averaged 0.5 parts per million, right at the level of concern. The researchers calculated that a 55-pound child can safely eat only one serving every two weeks."
I think every day is a bit much.. Thats just me though. I don't like to take chances (when I don't have to). Theres a chart at the bottom of that website. Shrimp are really good for protein, very low mercury levels, but can be pricey.