:-(
Hate to be the bearer of bad news....but I wouldn't recommend eating shark because it's often highly contaminated with mercury.
Most large fish like shark, tuna, swordfish have higher levels of mercury because they are both higher on the food chain and large animals therefore they consume large amounts of smaller mercury contaminated fish.
Mercury is particularly harmful to women of childbearing age because it can cause serious birth defects.
You can read more about it here:
http://ific.org/publications/qa/mercuryqa.cfm
Also, many shark species are endangered because they have been so heavily overfished. Although many people don't particularly care for sharks because of their (false) reputation as "maneaters" - they're actually very important to the ecology of the ocean and to the earth overall because they're at the top of the food chain.
I won't get on my marine conservation "soapbox" here (but feel free to visit my website!
www.MarineBio.org)
But for those of us who love seafood, it's increasingly important to eat the right kinds - both for our own health and so that our kids will be able to enjoy seafood too. Here's a link to a seafood guide for consumers:
http://www2.blueocean.org/Seafood_Detail/36
Joni
Edited to add this link as well for more info:
http://www.mbayaq.org/cr/seafoodwatch.asp
P.S. Sarah - I'm faithfully sticking with the challenge, and am up to about 10 pushups per set. My BF has challenged me with a $1000 bet to be able to do 50 per set. He's insane - and I never agreed to the "bet" but I'm definitely up for the challenge!