Has lytic activity against M.lysodeikticus, V.alginolyticus from Epinephelus fario, V.vulnificus from culture water, A.hydrophila from soft-shell turtle, A.hydrophila from goldfish and V.parahaemolyticus, P.fluorescens and V.fluvialis from culture water. Hydrolysis of (1->4)-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins. Expressed in intestine, liver, spleen, anterior kidney, posterior kidney, heart, gill, muscle and leukocytes. Belongs to the glycosyl hydrolase 23 family.