What is foxfire?

Fireflies, anglerfish, and other creatures produce the chemicals luciferin pigment, which in presence of a catalyst called luciferase, react with Oxygen and create light which is known as Bioluminescence.

foxfireHowever, a few species of Fungi show the bioluminescence and is called Foxfire. Most common such fungus is Honey mushroom, which belongs to genus Armillaria.