Fish – Guanine written by Jennifer Ocon February 3, 2017 Fish – Guanine is derived from fish scales. Fish – Guanine was last modified: February 3rd, 2017 by Jennifer Ocon 0 Facebook Twitter Google + Pinterest Leave a Comment Cancel Reply Save my name, email, and website in this browser for the next time I comment. Sign me up for the newsletter! This site uses Akismet to reduce spam. Learn how your comment data is processed.