Rhizopus is a common opportunistic fungus widely distributed in the environment, especially in soil, decaying organic matter, and spoiled food. It is characterized by its rapid growth and the presence of broad, aseptate hyphae. On culture media, its colonies appear cottony and white at first, then gradually turn gray or black as the spores mature. Rhizopus reproduces asexually by means of sporangiophores that bear sporangia containing sporangiospores. Medically, this fungus is one of the most important causative agents of mucormycosis, a serious fungal infection that mainly affects patients with uncontrolled diabetes or immunocompromised individuals. This infection is characterized by the ability of the fungus to invade blood vessels and cause tissue necrosis, leading to a black discoloration of the affected tissues. For this reason, the disease is commonly known as “black fungus”. Early diagnosis and prompt treatment are essential to reduce complications and mortality.