Some diseases of Puntius denisonii fish are caused by parasites and bacteria, which are triggered by poor water quality and inadequate diet. Puntius denisonii is the endemic fish of Kerala and Karnataka in southern India. You must ensure their diet and water quality when keeping them in an ornamental aquarium. Water freshness is essential when housing a group of Puntius denisonii, also known as red-line torpedo barb, in a tank. When they are not fed properly or due to poor water conditions, there will be common diseases that may attack them. Here are the diseases of Puntius denisonii fish. Dropsy Dropsy is when your fish accumulates fluid in their body tissues or cavity. This disease is caused by disrupting the fish’s kidneys or livers. However, this condition may lead to parasitic or bacterial infections if not treated properly. Poor water conditions, tank mate aggression, parasites, viruses, and inadequate diet can trigger this condition. You'll need some treatment steps when yo...