Enables monosaccharide binding activity and sialic acid binding activity. Acts upstream of or within cell adhesion; negative regulation of inflammatory response; and negative regulation of phagocytosis, engulfment. Located in external side of plasma membrane. Is expressed in several structures, including gonad; heart; hemolymphoid system gland; liver; and lung. Orthologous to several human genes including SIGLEC8 (sialic acid binding Ig like lectin 8). [provided by Alliance of Genome Resources, Apr 2022]