What are the common symptoms and treatment options for black spot disease in betta fish?

Common symptoms of black spot disease in betta fish include the appearance of black spots on their body, fins, or eyes, as well as lethargy and loss of appetite. Treatment options may include isolating the infected fish, maintaining clean water conditions, and using medications such as antifungal or antibacterial treatments. It is important to consult a veterinarian for proper diagnosis and treatment.