Trying to get more healthy protein in your diet; but tired of lean choices from two or four legged sources?
What about seafood?

Seafood is a great source of Omega-3 and protein. 
But it has had been associated with various food safety and ecological problems.  Just choose wisely, select those with the least amounts mercury and PCBs.  (Children, and women of child bearing age should be concerned with mercury and PCBs).  Environmental Defense Fund has a very helpful list to help choose seafood that is good for your body and the environment.  You can even print out a pocket size list to have handy while shopping.
http://www.edf.org/page.cfm?tagID=1521

The omega-3s found in fish (EPA and DHA) appear to provide the greatest health benefits. Fish that are high in omega-3s, low in environmental contaminants and eco-friendly include:

• wild salmon from Alaska (fresh, frozen and canned),
• Arctic char,
• Atlantic mackerel,
• sardines,
• sablefish,
• anchovies
• farmed oysters
• farmed rainbow trout and
• albacore tuna from the U.S. and Canada.

Where do you get your protein from if you don't eat two or four legged ones?