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Mucormycosis, also known as black fungus is an opportunistic and serious fungal infection which is created by the order Mucorales. These fungi have a wide geographical distribution. The most important predisposing factors for this disease are hyperglycemia, metabolic acidosis, overuse of corticosteroids, neutropenia and blood malignancies. The disease occurs in several different forms; The most common of which is gastrointestinal and respiratory disorders in animals. Proper and timely diagnosis of the disease can play a key role in the prognosis, control and treatment of the disease. Since the disease can occur as a secondary infection in patients with COVID-19 who are being treated with corticosteroids to reduce inflammation, this study examines the status of black fungus disease in case reports of coronavirus in susceptible animals. Up to now, some cases of coronavirus and pneumoarthritis have been reported in animals.