A  hint on how to create some really weird mutations and have fun
doing so:

     El-Fish stores its fish as roe in binary files. When you click on
Restore,  the  software  converts a roe file back into a fish. But you
can  also convert almost any binary or ASCII File-a customer database,
a  budget  spreadsheet,  a health-benefits memo into a fish. Just copy
the  file with new extension .ROE. (Don't use EXE or COM Files.) After
loading El-Fish, Click on Restore From and find the fishy new file. It
will  create  one  or  more  mutant aquatic life forms. I tried a file
containing Earned Run Average statistics for American League pitchers,
and as expected, the fish created was ex tremely ugly.