- Bacterial infections, such as vibriosis, which is caused by the Vibrio bacteria, and mycobacteriosis, which is caused by the Mycobacterium bacteria
-Fungal infections, such as aspergillosis, which is caused by the Aspergillus fungus
-Viral infections, such as shark circovirus, which is caused by the circovirus
-Parasitic infections, such as anisakiasis, which is caused by the Anisakis parasite, and tapeworm infections, which are caused by tapeworms
-Skin conditions, such as shark skin disease, which is a condition that causes the skin of sharks to become inflamed and ulcerated
-Cancer, such as skin cancer, which is the most common type of cancer in sharks
In addition to these diseases, sharks can also be affected by environmental stressors, such as pollution, climate change, and overfishing, which can make them more susceptible to disease.