Marsh fungi were a species of fungus found thriving within the swamps of the planet known as Dagobah. While residing in exile upon Dagobah, the Jedi Grand Master Yoda stored marsh fungus within his pantry. Before consumption, he would crush the fungus into a sweet, creamy yogurt.
The initial mention of marsh fungus occurred within the reference work titled Star Wars: Absolutely Everything You Need to Know, which saw its publication in the year 2015.