Malachite green is widely used in the aquaculture industry as an antifungal and antiparasitic agent to treat infections in fish and fish eggs. It is particularly effective against fungal infections like saprolegniasis and parasites such as ichthyophthiriasis. In the textile industry, it serves as a dye for silk, wool, and leather, providing a vibrant green color. Additionally, it has been employed as a biological stain in microscopy to enhance the visibility of cellular structures. However, its use is restricted in many countries due to potential health and environmental risks.