Mikeak and others who have asked:

For most general questions I start my online search for answers if I can't fine an answer here at the following 3 links which I suggest all learn how to use. They are easy with a little effort.

SRAC fact sheets

http://srac.tamu.edu/fulllist.cfm

Fish base

http://www.fishbase.org/search.php?lang=English

Aquanic

http://aquanic.org/index.htm

From these three there is a world of info. Just look for your self.