In regards to the yellow question...it really has more to do with the environment rather than what fish are eating. Do you see many red or blue bass (from eating craws)? I certainly have not. Now if the envirnoment was red clay...maybe.

If you notice for the most part when the water color is murky, most of the fish seem pale. Likewise, if the water is clear, the fish tend to be darker. Same goes true with environmental factors. Bass are designed to blend in with their surroundings as best as possible. What makes them the predator they are!

I'm not a scientist (but my Dad is!) but took enough courses back in college to know this along with seeing my Dad in action (and non-stop questions!).

True, like Chris said, sometimes the flesh can be of different colorations due to forage but for the most part, the outside is not.

Todd

http://www.bassanglerprofiles.com/toddiwamoto.htm