Marine Ich (Ichthyophthirius multifiliis)

Marine Ich, caused by the parasite Ichthyophthirius multifiliis, is a common disease affecting fish in saltwater aquariums and marine environments. It appears as white spots on the fish's skin, fins, and gills, resembling grains of salt. The parasite infects and feeds on the fish's tissues, leading to irritation, flashing (scratching), respiratory issues, and in severe cases, death. It spreads rapidly in crowded or stressful conditions. Treatment typically involves increasing water temperature, using medicinal treatments, and improving water quality to boost the fish’s immune response and eliminate the parasite.