Its unoptimised so I doubt it'll do very well, but It happened by accident, I was testing slither (all my sims have alga and animal to make it realistic) and I forgot to check the no mutations box, It got 1 major, major but fun looking mutation. I suggest you have a bit of a look at it in a sim, its dead fun to watch, and maybe it might become useful on how it spreads out.
Slither currently doesn't move far (though that will change soon hopefully) so I guess it was an escape/hunt mechanism, a bit like in all_hunter!
'#generation: 0
'#mutations: 1
cond
*.eye5 0 >
*.refeye *.myeye !=
start
*.refveldx .dx store
*.refvelup 30 add .up store
stop
'''''''''''''''''''''''' Gene: 1 Ends at position 17 '''''''''''''''''''''''
'''''''''''''''''''''''' Gene: 2 Begins at position 18 '''''''''''''''''''''''
cond
*.eye5 50 >
*.refeye *.myeye !=
start
-1 .shoot store
*.refvelup .up store
stop
'''''''''''''''''''''''' Gene: 2 Ends at position 32 '''''''''''''''''''''''
'''''''''''''''''''''''' Gene: 3 Begins at position 33 '''''''''''''''''''''''
cond
*.eye5 0 =
*.refeye *.myeye =
or
start
314 rnd .dx store
stop
'''''''''''''''''''''''' Gene: 3 Ends at position 46 '''''''''''''''''''''''
'''''''''''''''''''''''' Gene: 4 Begins at position 47 '''''''''''''''''''''''
cond
*.nrg 20000 >
start
10 .repro store
stop
'''''''''''''''''''''''' Gene: 4 Ends at position 55 '''''''''''''''''''''''
'#hash: 6b"9muEGI\,'5WTW=Qm#
And the MRATE FILE (after opening in notepad):
80
80
5000
3
1
5000
1
0
5000
3
1
5000
1
0
5000
250
75
5000
3
1
5000
1
0
5000
500
150
5000
250
75
5000
1
0
5000
1
0