Bettas can carry various diseases and parasites, including bacterial infections, fungal infections, and parasitic infestations. These diseases can be transmitted through direct contact, shared water, or contaminated objects.
If multiple betta fish are kept in the same bowl, it is important to closely monitor their health and water quality. Early detection and treatment of any illnesses can help prevent the spread of diseases to other fish.
To minimize the risk of disease transmission, it is generally recommended to keep betta fish in separate bowls. If you do choose to keep multiple betta fish together, make sure to provide them with enough space, hiding spots, and monitor their interactions closely.