Malachite green is widely used in the aquaculture industry as an antifungal and antiparasitic agent to treat fish and fish eggs, particularly in controlling fungal infections like saprolegniasis. It also exhibits antibacterial properties against certain pathogens. It is employed as a disinfectant in aquaculture systems to prevent the spread of diseases. In the textile industry, it serves as a dye for silk, wool, and leather, providing a vibrant green color. Additionally, it is utilized in biological staining for microscopy to highlight cellular structures and in analytical chemistry as an indicator or reagent, such as in phosphate determination assays. However, its use is restricted or banned in many countries for food-producing animals due to concerns about toxicity, potential carcinogenic effects, and environmental impacts.