Interesting. Definitely some self-selection going on.
I personally like to understand why things work. Just found a graduate level fish physiology course online from University of Tennessee by Dr. Richard Strange. http://web.utk.edu/~rstrange/wfs550/entry3.html
He's put together a CD that several of us on another board are getting together and ordering. http://bellsouthpwp.net/r/s/rstrange/
That should help get us more geeked up.