A hint on how to create some really weird mutations and have fun doing so :
ElFish 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 Filea customer database a budget spreadsheet a healthbenefits memo into a fish. Just copy the file with new extension .ROE. Don't use EXE or COM Files. After loading ElFish 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 extremely ugly.