You’ve probably heard about the great white sharks off Cape Cod that are hunting seals, getting tagged by scientists, and making national news. Well, here are video and photos (as well as some quick background info) from the Massachusetts Department of Fish and Game about how the scientists are going about the process:

After multiple shark sightings off of the coast of Chatham last week, [Division of Marine Fisheries Senior Biologist Greg] Skomal and other state biologists set out to identify the species of the sharks recently sighted in the waters off Monomoy Island in Chatham. On Saturday, [harpooner Bill] Chaprales placed tags on two sharks. An additional three sharks were tagged today in the waters off Monomoy Island in Chatham. The tags, which use satellite-based technology to record where a shark travels, allow scientists to better understand migratory patterns.