Amylase is a widespread starch-digesting enzyme which occurs in human saliva and in pancreatic secretions into the small intestine. Amylase activity has been found in goldfish and bluegill sunfish in extracts of mixed liver and pancreas, oesophagus (contamination from regurgitated food suggested) and intestine, but not in large-mouth bass. Similar activity has been seen as well in rainbow trout, perch, Tilapia, Pacific salmon, cod, common carp, eel, and flounder. In fish with a diffuse pancreas there may be no pancreatic duct and so amylase activity appears in the bile. In mackerel. Scomber spp., which have a compact pancreas, the bile had no amylase activity.