The folks in this photo were about one mile from where we were fishing the other day (Chatham, MA). They were tagging Great White Sharks. I did not get a shot of the actual tagging but we did see a fin several times directly under the bow pulpit. They had a spotter plane circling above them and were towing a seal decoy.At one point we saw a fin break the surface near our boat so we reeled in our lines and gave pursuit with our cameras at the ready...............unfortunately it turned out to be a whale about 17 ft long. BTW we were in my 19ft center console so if we did get up next to a shark there is a good chance we would have been around the same length. Maybe next time!