Enables exo-alpha-sialidase activity. Predicted to be involved in several processes, including ganglioside catabolic process; positive regulation of neuron projection development; and regulation of myoblast proliferation. Predicted to act upstream of or within carbohydrate metabolic process and lipid catabolic process. Located in lysosome. Is expressed in alimentary system; brain; intestine; midgut; and midgut loop. Used to study glycoproteinosis. Orthologous to human NEU1 (neuraminidase 1). [provided by Alliance of Genome Resources, Apr 2022]