From leaping out of the water to gorging on giant mouthfuls of herring, these sea mammals look as though they're truly having a whale of a time!

Award-winning photographer Espen Bergersen, 37, first noticed dozens of orcas and humpbacks gathering close to the shore by his childhood home on the northern Norwegian island of Andøya, eight years ago.

Since then, he has been ardently documenting the magnificent creatures during their migration, with his work helping scientists better understand their mysterious feeding, mating and communication behaviours.

Bergersen told MailOnline Travel that it is unusual to see orcas and humpbacks swimming together but there is one thing uniting the two species: food.

Hundreds of whales flock to northern Norway each year between October and January for the abundant herring stocks, with a mass feeding frenzy taking place.

Scroll down to view a selection of Bergersen's awe-inspiring photos taken in the fjords outside Vesterålen and Troms, which will have you yearning to hop on a boat to Norway and witness these scenes of natural threatre for yourself...