Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to act upstream of or within negative regulation of peptidase activity. Predicted to be located in extracellular region. Is expressed in several structures, including alimentary system; branchial arch; central nervous system; hemolymphoid system; and liver. Orthologous to human SPINK8 (serine peptidase inhibitor Kazal type 8 (putative)). [provided by Alliance of Genome Resources, Apr 2022]