The footage was filmed 155 nautical miles north east of Aberdeen by chief officer Graeme Hately on board the Grampian Protector.
Graeme estimates there were up to 30 orcas in the area at the time, and based on their behaviour believes they were hunting for shoals of fish.
One of the frames, taken underwater using a GoPro camera attached to a buoy and a weight, briefly shows a mother and a baby swim past the side of his vessel.
