In response to Gil Gillespie's inquiry- One source of info about tilapia is: John Leininger, CEO North American Fish Farmers Cooperative P.O. Box 219 Carrington ND 58421-0219 (701)652-1130, fax (701)652-2055 Regards, Steve Bonney, President Indiana Sustainable Agriculture Association 100 Georgton Ct. W. Lafayette IN 47906 (317) 463-9366, fax (317) 497-0164 email sbonney@holli.com