El-Fish

El-Fish cheat codes: 
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.