Has bacteriolytic activity (By similarity). May play a role in digestion and in the host defense mechanisms against invading microbes (PubMed:16996284). 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 the basophil cells of the oyster digestive gland. Belongs to the glycosyl hydrolase 22 family. Type-I lysozyme subfamily.