Do fish die if they have the i ch?

Yes, fish can die from a parasitic disease called ich or "Ichthyophthirius multifiliis." This microscopic protozoan parasite infects the skin and gills of fish, causing white or gold spots to appear on their bodies. If left untreated, the disease can progress and lead to respiratory distress, weakness, and ultimately death in fish. Therefore, it is important to take prompt action to treat ich when it is detected to improve the chances of fish survival and prevent the spread of the infection to other fish.