Parasin I is a naturally occurring antimicrobial peptide derived from catfish. Its primary application is in the field of biomedical research and potential therapeutic uses due to its strong antibacterial properties. It has shown effectiveness against a broad spectrum of bacteria, including both Gram-positive and Gram-negative strains, making it a promising candidate for developing new antibiotics, especially in the face of increasing antibiotic resistance. Additionally, Parasin I is being studied for its potential in wound healing and as a component in antimicrobial coatings for medical devices to prevent infections. Its mechanism of action, which involves disrupting bacterial cell membranes, is also of interest for designing novel antimicrobial agents.