Black fungus

Black fungus may refer to:


 * Mucormycosis, an infection of sinuses, brain, lungs or other areas informally known as "black fungus" and sometimes associated with COVID-19
 * Wood ear, several species of edible fungus known as black fungus
 * Boletus aereus, an edible mushroom known as ontto beltza (black fungus) in Basque
 * Black yeast, a group of slow-growing microfungi with melanin in their cell walls