The Ayug is a Maxis made early creature, present in the final game. They are small, round creatures with no special features. They are very simple creatures, and are newly evolved from the ocean.
Ayug are carnivorous creatures, but may have problems while fighting. Their only attack is a weak bite with their jaws. They will probably eat other early creatures or dead preys of more evolved ones.
While socializing, the only thing the Ayug can do is sing. However, they aren't adept at it, and can be easily outsmarted.