Ghost Fungus (Omphalotus nidiformis)
The Ghost Fungus starts to fruit after the first autumn rains. It is a common wood-rotting fungus of Perth and other parts of Australia. Look for it on living tree trunks or dead logs. It is a big fungus forming groups up to 50 cm across. It is known as a gilled-bracket fungus because it grows shelf-like out of trees and wood but also has gills like many soil-borne fungi. It is not edible.
This fungus is one of very few fungi worldwide that are bioluminescent. To best see the ghost fungus glow in the dark you need to first spot them by day and return on a dark night with very little light pollution and wait for your eyes to adapt. The image of bioluminescence below required a 30 second exposure in total darkness.