Black spots on fish, also known as melanosis or black ich, are usually caused by a parasitic infection or environmental stressors. The spots are typically small, black, and often appear on the fins, body, or eyes of the fish. They may also appear as a darkening of the scales. The most common cause of black spots is a parasitic infection, which can be caused by various organisms such as Ichthyophthirius multifiliis, or "ich." Environmental stressors such as poor water quality or overcrowding can also weaken a fish's immune system and make it more susceptible to infection. Treatment for black spots may involve medication or improving the water quality in the tank.
Black spots on fish, also known as melanosis or black ich, are usually caused by a parasitic infection or environmental stressors. The spots are typically small, black, and often appear on the fins, body, or eyes of the fish. They may also appear as a darkening of the scales. The most common cause of black spots is a parasitic infection, which can be caused by various organisms such as Ichthyophthirius multifiliis, or "ich." Environmental stressors such as poor water quality or overcrowding can also weaken a fish's immune system and make it more susceptible to infection. Treatment for black spots may involve medication or improving the water quality in the tank.