Antimicrobial peptide with broad-spectrum activity against Gram-positive and Gram-negative bacteria as well as against a variety of fungi. Rapidly inactivates channel catfish herpesvirus (ED(50)=4 uM) and frog virus 3 (ED(50)=13 uM) over a wide temperature range (PubMed:15193922). Seems to disrupt the membranes by adopting an alpha helical conformation and forming toroidal pores. Has hemolytic activity. Expressed in mast cells in gill, skin and gut, and in lining blood vessels in the viscera. Also in intestine, spleen, anterior kidney, and blood cells. Belongs to the pleurocidin family.