Antimicrobial peptide with broad-spectrum activity against Gram-positive and Gram-negative bacteria. Rapidly inactivates both channel catfish herpesvirus (ED(50)=11 uM) and frog virus 3 (ED(50)=16 uM) over a wide temperature range (PubMed:15193922). Has hemolytic activity. Associates with lipid bilayers via its amphipathic helix and can insert itself into the lipid bilayer. Mast cells in gill, skin and gut, and in lining blood vessels in the viscera. Belongs to the pleurocidin family.