Gorgon

A Gorgon is a relative of Enigmas in Super Mario RPG: Legend of the Seven Stars. They are encountered in the Sunken Ship. Although a Gorgon resembles a large, green bat, the monster is actually a colony of smaller bats that come together to create one larger Gorgon. Somehow, these bats can both think independently and combine their consciousnesses to act as one being. Interestingly, the large Gorgon resembles the small bats that make the monster up. These bats can even detach themselves from the group and reform into different shapes.

Trivia

 * Gorgons are named after the snake-haired, female beasts of the same name prevalent in Greek mythology.