All the AnacondaS are in the form of Crocodiles. It would be easy to kill
Crocodiles

Goto your game folder

Open "anim" folder
Copy "crocodile#s.am2", "crocodile#s.am3", "crocodile.am2", "crocodile.am3",
to another folder safely.
In another folder, Again copy all the above files & paste in that same folder 3
times..

Rename, "crocodile#s.am2 & .am3", files to "anacoconda_adult#s.am2 & .am3"
Rename "crocodile.am2 & .am3", files to "anaconda_adult.am2 & .am3"

similarly Rename remaining "crocodile#s", crocodile" files to
"Anaconda_mother#s",
"Anaconda_mother", "Anaconda_y#s", "Anaconda_y", "Anaconda_ya#s", "Anaconda_ya",
respectively..

Now, Copy all the above files from another folder & paste into "anim" folder &
replace it..

Go to your game folder

Open "unit" folder
Copy "crocodile#s.am2", "crocodile#s.am3", "crocodile.am2", "crocodile.am3",  to
another
folder safely.
In another folder, Again copy all the above files & paste in that same folder 3
times..

Rename, "crocodile#s.am2 & .am3", files to "anacoconda_adult#s.am2 & .am3"
Rename "crocodile.am2 & .am3", files to "anaconda_adult.am2 & .am3"

similarly Rename remaining "crocodile#s", crocodile" files to
"Anaconda_mother#s",
"Anaconda_mother", "Anaconda_y#s", "Anaconda_y", "Anaconda_ya#s", "Anaconda_ya",
respectively..

Now, Copy all the above files from another folder & paste into "unit" folder &
replace it..

Start the game