Klikit, it's a vid....
I parked the boat and held the dog when we let Agnes off to creep a couple hundred yards up on this sleeping bag of meats and oils
It was snoozing and she ran a wide detour on the land behind it on its rivers mouth bank. It took awhile and I didnt find the camera untill I got to her, so I missed the "kill" on film, but You'll get the jist of this , Im sure.
A Harpoon is the usual, and it usually kills them quickly and the floating shaft show where the Seal is in the river, but Agnes found the sharp blade of the harpoons tip missing, so the hook was adhoc, but did the trick quite well