Export Your Wormy Monsters
Click on a cool creature and click the [Export Creature] Button. It is the box down on the right of the screen. This should bring up a window which is empty. You can also create a creature by clicking the [Genetic Engineering] button.

Save Your Wormy Creatures
Then name the Creature what ever you like and save it by clicking [Export] Button. Once you have done that, you will have to quit the game and completely close it before going into to the game files and editing anything.

This is pretty simple to do this cool modifcation i found while tinkering around with the game files!
First your going to wanna go to this location on your computer and find this file, its different on mine but it should look something like this.
(your location)\Steam\steamapps\common\Species ALRE\Creatures

First Make Your Folder
Create a new folder in the Creatures Folder, Name The New folder whatever you want appropriately And Follow the Next step.

Begin Moving The Creatures Into the Folder
Drag the selected creatures' files and pictures that go with them that you want to have in the new file(please note that if you cut them from the main folder they will no longer show up as importable)

Just throw the poor Creatures in there!
Once You Have Created the new folder And dragged the selected creatures' files and images you want inside of a new folder. Name folder whatever you want appropriately. Once done and it looks like this, you're ready to start the game up

When Done it should look like this
Place all the creatures inside of a new folder and once done and you have completed the past steps you should have it looks just like this, Now that it is done you're ready to start the game up and have the fun part.

A new Game and a new Day.
Press the [New Game] button and select your setting from the tab. Everything else is up to you, but now you can have custom starting animals in your game! Only thing that changes are the creatures. so dont worry about it creating a new save.